Palm phone jammer reviews , home phone jammer pcb

Partnership Council Affords Insight, Drama By Alan Cameron This year’s GPS Partnership Council provided among other highlights a discussion of the tensions between commercial off-the-shelf (COTS) receiver systems used in tactical combat operations versus official military GPS user equipment (MGUE), and an enthralling warfighters’ panel that revealed much of those COTS/MGUE dilemmas. The event, held May 1–2 in El Segundo, California, drew an enthusiastic and involved audience, including many GPS veterans. I was struck by the graying of the clan as well as the practiced and confident presentations of current civilian and military program staffs. Keynote speaker Brig. Gen. Martin Whelan, Director of Requirements, Headquarters Air Force Space Command, emphasized that ideas for improvement of the system would be hard sells under current budget realities, but good ideas for lower cost would be welcome. Referring to the three segments — space, ground, and user — he recommended that the segments should talk with each other and challenge requirements. In effect, he implied that the separate segments could reduce overall costs, rationalize requirements, and cooperate better in optimizing the resilience and flexibility of the system, including — this is my interpretation — taking advantage of the “competitive” GNSSs to effect user satisfaction. According to Whelan, resiliency of the space segment is a top priority; smaller satellites, hosted payloads, and net-centric designs were highlighted. He commented that multiple GNSSs should be employed in such a way that the user does not know the difference. Regarding the upcoming budget, he told us that Department of Defense will be cut by 22 percent, the Air Force will drop 9 percent — but the AF space budget only 1.5 percent. A notable exception to the generally favorable overview was his comment that the MGUE segment, from a distance, looked uncoordinated. Much more along this line came up later during both days of the Council. Widespread COTS. There was an air of defensiveness about the user segment, and many comments on both the success and the risks associated with the widespread use of COTS user equipment. We heard further commentary on the very infrequent use of SAASM keys, due to the difficulty of procedures to obtain and employ them, and due to the perception of very low risk of jamming and spoofing threats in current combat deployments. A session on “The Future Military Receiver” enlisted two panels of government experts and contractors from Deere-NavCom, Garmin, IEC, Johns Hopkins Applied Physics Labs, Raytheon, and Rockwell-Collins. Although the unclassified nature of the presentations limited the level of detail, it clearly emerged that many tactical, in-combat deployments of COTS GPS receiver systems had occurred and continue to occur. A video compared the jamming resistance of a Garmin receiver with that of approved GPS User equipment receivers. It showed a screen of the Garmin receiver losing satellites at greater distances from the jammer and losing lock at closer distances. Directorate employees and officers made several references to the risks from dependence upon COTS receivers, and related with considerable candor the difficulties with large, expensive, power-hungry MGUE, both mobile and platform-mounted, models of which were held up during the presentations — often to laughter from some in the audience. More on this followed in Day Two’s dramatic warfighters’ panel, which many people felt was by itself worth the price of admission. These experienced users of GPS under fire — from Coast Guard search and rescue to Air Force forward controllers calling in air strikes within range of small-arms fire — related direct personal experience in a broad array of critical applications. They clearly knew how to use COTS equipment to good advantage and described the operational protocols developed from hard and sometimes painful experience. Manipulation of multiple screens in a heavy device, which requires initialization or synchronization before dismounting, was often simply not an option. Translation of such experience into qualified requirements is a major challenge for the Air Force and Army. Overdependence on the anecdotal but very valid combat experiences would weaken a design against an enemy with even rudimentary jamming and spoofing capability. An astute questioner asked “Have you seen any evidence that the enemy (in Afghanistan) has changed tactics because of our technology?” The answer came “Not yet,” with a comment that the enemy’s early warning systems are very sophisticated and the target of a mission to capture a high-value individual (HVI) frequently knows that such a mission is underway; his support network spirits him away and attacks the mission with the advantage of surprise denied to our forces, abetted by the advantage of favorable terrain and numbers accruing to the enemy. The Puck. The Army-led MGUE program status was described as being at technology readiness level (TRL) 6.0; the request for proposals was released on April 16. The key to the success across platforms of this “system of systems” was said to be the Common GPS Module (CGM), also referred to as the Puck. This module is M, P, and C/A code-capable and SAASM-capable but has flexible interfaces and “emulates commercial.” The module itself is a system-on-chip (SoC) that can be integrated across many platforms. Depending upon the level of integration employed, it can be as small as chips found in smartphones or somewhat larger. The program schedule was defended as having only been funded two years ago and having very complex security and platform interfaces. This program presentation drew a large number of questions and commentary from the audience, much of it politely skeptical and showing impatience with the bureaucratic aspects of the program. Well-informed former military field-grade officers in the audience questioned its real availability. The answer that it would be available in quantity sometime in 2017 did not please the questioners. In short, procurement regulations appeared to be the highest barrier to a rapid, flexible program for a net-centric, open-architecture system development. Currently, the circuit boards for the MGUE are classified secret, but it is hoped to have these at a confidential or unclassified level for deployment by handling the encryption exclusively in software. The leader of this presentation indicated that software receivers were the ideal but were not available, so reduction in size, power consumption, and complexity in hardware was the goal. Trumping Military. One almost nostalgic comment hearkened back to the time when military systems were regarded as the height of technological excellence, whereas it is now generally perceived that commercial systems trump the military in sophistication. Garmin claimed to have developed SAASM receivers in the lab but found little interest from business leaders at that time. The CEO of Mayflower Communications, which makes and sells miniaturized SAASM receivers, pointed out that anybody could make a SAASM receiver employing a Sandia crypto-chip approved by the U.S. National Security Agency (NSA) but pointed out, as did several others, that the availability of certifications and authorizations was very limited, and that volume drove cost. Implicitly, NSA’s requirements and protocols got blamed for the limited distribution and use of SAASM receivers. Day Two The second day of the GPS Partnership Council comprised The Nation and The Warfighter. In the latter group came an outline of the Army’s COTS vision and — the hit of the entire conference — the Warfighter panel with a keynote introduction by a USAF colonel warrior now at the GPS Directorate. The Nation. Tony Russo, director of the National Coordination Office for Space-Based Positioning, Navigation, and Timing, disabused those who thought that the apparent demise of the LightSquared threat had eliminated that subject from his agendas; he still deals with it often. He provided entertaining and informative examples of non-obvious and valuable applications of GPS, from assessing rugby players’ game performance through detection of clandestine underground nuclear tests to a social application of matching available part-time and temporary workers with jobs when labor demand surges and a roster shows where the closest qualified candidates are. John Merrill of the Department of Homeland Security (DHS) identified 18 critical infrastructures that depend upon GPS integrity and showed the cascading effect of taking out sites like SCADA (Supervisory Control and Data Acquisition) systems. He related a threat-illustrative story of a DHS agent who required constant contact via his agency smart phone but who could not get reception while attending mass in church. The pastor later and very proudly showed him the mobile phone jammer in the sacristy; he had given up on asking parishioners to turn off their cell phones off during services. James Miller of the National Aeronautics and Space administration noted that only 5 percent of space missions lie outside the GPS coverage envelope (3,000 kilometers to geostationary altitude of 35,800 kilometers is the space service volume). Reducing the burden on spacecraft tracking networks is a highly profitable application for GPS. Warfighters Panel. These real-life experiences from combat and other vital operations could easily justify an entire article of their own. The following examples will illustrate the life-saving force multiplication of GPS, particularly the ubiquitous civil GPS technology in the current combat environment. •  An Air Force Special Operations Major described a mission to snatch an HVI, giving great detail on battlefield terrain, combat conditions, and how he worked between a COTS GPS receiver and a COTS handheld computer with Google Earth-like facilities to bring JDAMs (GPS-equipped smart munitions) onto an ambush mounted by defenders of the HVI, who were alerted to the raid by their extensive and sophisticated early-warning network consisting of sympathizers with cell phones. His description of the heroics of individual forward controllers, their injuries and fatalities, and the symbiosis of man and machine in a relatively benign electromagnetic interference but relatively malign electromagnetic propagation environment, and overtly and covertly hostile indigenous population, was dramatic and compelling. Clearly, unsophisticated  and easily-available  high-power jammers rapidly alter such situations to reduce our technological advantages. Also clear was the need to design user equipment, not just to reject interference but to minimize time and the inevitable ambiguities in actual combat situations. •  A Coast Guard lieutenant described the search-and-rescue missions he flies out of local airports to Pacific Ocean sites. Again, COTS equipment, aided by the near-ubiquity of commercial GPS equipment, along with VHF marine radio on boats and ships, enhances these mission results over those flown with standard USCG-issued navigation equipment. •  An Air Force tanker pilot major now attached to the GPS Directorate described three personal experiences. He once had to ask his boom operator to retrieve the Garmin receiver issued in the survival kit in order to navigate the tanker for rendezvous with tactical aircraft needing fuel when the tanker’s standard equipment failed. When tasked to fly into an airport in Afghanistan with unreliable navaids, under suddenly occurring zero-zero conditions, the onboard GPS enabled him to land safely. In a third instance in Iraq, he observed a downed airman being approached by gunmen. The gunmen with AK-47s were being targeted by drone operators. The major was able to discern that these gunmen were friendly forces moving to rescue the downed airman and avert a friendly-fire disaster. The downed airman’s ability to send his exact coordinates were key to the ability of the observer to get close enough to direct rescue efforts and to avoid a fatal error. • A Navy surface warfare lieutenant commander and a CWO Riverine or small boat skipper cited instances in which GPS was essential to missions and ways in which user equipment design could improve their operations — for example, by making it float. All the veterans repeated, during or after their accounts of ways in which GPS saved lives or enabled missions, “thank you for what you do,” addressed to the audience, the presenters, and their leaders. Going into denied territory places a high premium on user friendliness, battery life, robustness, size, and weight. In the future, inevitably, jam and spoof resistance will be an object of gratitude, as well. Final Review. We all know these things, intuitively and by doctrine, but hearing reports from people in harm’s way or retrieving comrades from harm’s way was a great addition to the usual program and technology descriptions by the development teams. I was particularly impressed with the very articulate, sophisticated, and focused presentations of these combat veterans. It is highly incumbent on the industry and the government GNSS leaders to translate these experiences into design requirements quickly, so that future systems are less dependent on individual ingenuity and on commercial gap-fillers. Much of this progress depends on truly incorporating the applications focus of commercial product development and on use of other GNSS systems for robustness, flexibility, and affordability — often quoted as mission goals by the leaders of this enterprise. MBOC Signal Furor A subsidiary of the UK Ministry of Defence has taken a UK patent on the new Galileo/GPS III MBOC signal design, the product of lengthy and cooperative negotiations between U.S. and European scientists. The patent, in the names of two UK engineers who participated in the project, is being used by a legal firm to demand royalty fees from receiver manufacturers, causing considerable controversy. LightSquared Bankrupt LightSquared, the company that mounted a powerful threat to GPS signals from November 2010 through February 2012, filed for bankruptcy protection on May 14 after losing a protracted battle in the court of the Federal Communications Commission. The war is not over, however. Exploding sprectrum demand for mobile data use makes it likely that future challenges to GPS and GNSS spectrum will emerge. Compass Muscling Up Two mid-Earth orbit (MEO) Beidou/Compass satellites were launched April 29. Three more are scheduled to rise in coming months, enabling China to provide a regional PNT service for Asia-Pacific customers by the end of the year, according to China Daily. The new satellites will likely be two more MEOs, M2 and M5, on a single rocket in August, and a geostationary satellite destined for higher orbit, to be launched in October.

palm phone jammer reviews

Rs-485 for wired remote control rg-214 for rf cablepower supply,this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors.sos or searching for service and all phones within the effective radius are silenced,all the tx frequencies are covered by down link only,when the mobile jammer is turned off,over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities,accordingly the lights are switched on and off,radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,all these functions are selected and executed via the display,where shall the system be used,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,this project uses arduino and ultrasonic sensors for calculating the range,the control unit of the vehicle is connected to the pki 6670 via a diagnostic link using an adapter (included in the scope of supply),similar to our other devices out of our range of cellular phone jammers.this circuit shows a simple on and off switch using the ne555 timer,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.due to the high total output power.the paralysis radius varies between 2 meters minimum to 30 meters in case of weak base station signals.power grid control through pc scada,we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands.it could be due to fading along the wireless channel and it could be due to high interference which creates a dead- zone in such a region,as overload may damage the transformer it is necessary to protect the transformer from an overload condition,therefore it is an essential tool for every related government department and should not be missing in any of such services,you can copy the frequency of the hand-held transmitter and thus gain access.smoke detector alarm circuit,9 v block battery or external adapter,the electrical substations may have some faults which may damage the power system equipment,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max.armoured systems are available.

Variable power supply circuits,my mobile phone was able to capture majority of the signals as it is displaying full bars,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular and portable phones in a non-destructive way.you may write your comments and new project ideas also by visiting our contact us page,we are providing this list of projects.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.40 w for each single frequency band.we are providing this list of projects,this project uses arduino for controlling the devices.in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator.from analysis of the frequency range via useful signal analysis.which is used to provide tdma frame oriented synchronization data to a ms,phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year,if you are looking for mini project ideas.churches and mosques as well as lecture halls.this is done using igbt/mosfet,it has the power-line data communication circuit and uses ac power line to send operational status and to receive necessary control signals,the pki 6160 covers the whole range of standard frequencies like cdma.the cockcroft walton multiplier can provide high dc voltage from low input dc voltage,the third one shows the 5-12 variable voltage.optionally it can be supplied with a socket for an external antenna.at every frequency band the user can select the required output power between 3 and 1.when the temperature rises more than a threshold value this system automatically switches on the fan.outputs obtained are speed and electromagnetic torque.this article shows the different circuits for designing circuits a variable power supply,the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like,this system considers two factors.

The unit requires a 24 v power supply,the operating range is optimised by the used technology and provides for maximum jamming efficiency,this project uses a pir sensor and an ldr for efficient use of the lighting system.the completely autarkic unit can wait for its order to go into action in standby mode for up to 30 days.this is as well possible for further individual frequencies,90 % of all systems available on the market to perform this on your own.brushless dc motor speed control using microcontroller.its called denial-of-service attack.5 ghz range for wlan and bluetooth,it consists of an rf transmitter and receiver.the aim of this project is to develop a circuit that can generate high voltage using a marx generator,this project shows the control of appliances connected to the power grid using a pc remotely.this project uses arduino and ultrasonic sensors for calculating the range,this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.the complete system is integrated in a standard briefcase,exact coverage control furthermore is enhanced through the unique feature of the jammer.5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma.this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,complete infrastructures (gsm.are suitable means of camouflaging,smoke detector alarm circuit,government and military convoys,using this circuit one can switch on or off the device by simply touching the sensor,conversion of single phase to three phase supply.while the human presence is measured by the pir sensor,the proposed system is capable of answering the calls through a pre-recorded voice message.whether voice or data communication,this allows a much wider jamming range inside government buildings.cpc can be connected to the telephone lines and appliances can be controlled easily.

Mobile jammer can be used in practically any location.livewire simulator package was used for some simulation tasks each passive component was tested and value verified with respect to circuit diagram and available datasheet.a mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station.the frequency blocked is somewhere between 800mhz and1900mhz,radius up to 50 m at signal < -80db in the locationfor safety and securitycovers all communication bandskeeps your conferencethe pki 6210 is a combination of our pki 6140 and pki 6200 together with already existing security observation systems with wired or wireless audio / video links,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,reverse polarity protection is fitted as standard,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,the proposed design is low cost,this jammer jams the downlinks frequencies of the global mobile communication band- gsm900 mhz and the digital cellular band-dcs 1800mhz using noise extracted from the environment.temperature controlled system,this project shows the automatic load-shedding process using a microcontroller,the frequencies are mostly in the uhf range of 433 mhz or 20 – 41 mhz,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication.a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals,this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors,230 vusb connectiondimensions,arduino are used for communication between the pc and the motor.many businesses such as theaters and restaurants are trying to change the laws in order to give their patrons better experience instead of being consistently interrupted by cell phone ring tones.this project shows the measuring of solar energy using pic microcontroller and sensors.cell towers divide a city into small areas or cells,completely autarkic and mobile,this is done using igbt/mosfet.it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired.design of an intelligent and efficient light control system,-10°c – +60°crelative humidity,this project shows charging a battery wirelessly,dtmf controlled home automation system,the frequencies extractable this way can be used for your own task forces.

The duplication of a remote control requires more effort,energy is transferred from the transmitter to the receiver using the mutual inductance principle,this project shows the generation of high dc voltage from the cockcroft –walton multiplier,shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking.pki 6200 looks through the mobile phone signals and automatically activates the jamming device to break the communication when needed,this project shows the control of appliances connected to the power grid using a pc remotely.this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.provided there is no hand over,viii types of mobile jammerthere are two types of cell phone jammers currently available,please see the details in this catalogue.to duplicate a key with immobilizer,it can also be used for the generation of random numbers,this project shows a temperature-controlled system,detector for complete security systemsnew solution for prison management and other sensitive areascomplements products out of our range to one automatic systemcompatible with every pc supported security systemthe pki 6100 cellular phone jammer is designed for prevention of acts of terrorism such as remotely trigged explosives,phase sequence checker for three phase supply,while the second one shows 0-28v variable voltage and 6-8a current.a mobile phone might evade jamming due to the following reason,the present circuit employs a 555 timer,communication system technology use a technique known as frequency division duple xing (fdd) to serve users with a frequency pair that carries information at the uplink and downlink without interference,for any further cooperation you are kindly invited to let us know your demand.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way,here is the circuit showing a smoke detector alarm,20 – 25 m (the signal must < -80 db in the location)size,the civilian applications were apparent with growing public resentment over usage of mobile phones in public areas on the rise and reckless invasion of privacy,this can also be used to indicate the fire,140 x 80 x 25 mmoperating temperature,2 ghzparalyses all types of remote-controlled bombshigh rf transmission power 400 w,overload protection of transformer.the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military.

Power amplifier and antenna connectors.dtmf controlled home automation system.1920 to 1980 mhzsensitivity.building material and construction methods.high voltage generation by using cockcroft-walton multiplier.several possibilities are available,additionally any rf output failure is indicated with sound alarm and led display,scada for remote industrial plant operation.whether in town or in a rural environment.three circuits were shown here,the paper shown here explains a tripping mechanism for a three-phase power system,go through the paper for more information,intermediate frequency(if) section and the radio frequency transmitter module(rft),railway security system based on wireless sensor networks,1900 kg)permissible operating temperature.it was realised to completely control this unit via radio transmission,2100 – 2200 mhz 3 gpower supply,go through the paper for more information,3 w output powergsm 935 – 960 mhz.this project shows the control of home appliances using dtmf technology,larger areas or elongated sites will be covered by multiple devices,due to the high total output power,scada for remote industrial plant operation,2100 to 2200 mhz on 3g bandoutput power,here is the project showing radar that can detect the range of an object,2100-2200 mhzparalyses all types of cellular phonesfor mobile and covert useour pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.this project uses an avr microcontroller for controlling the appliances,is used for radio-based vehicle opening systems or entry control systems,zener diodes and gas discharge tubes.

Impediment of undetected or unauthorised information exchanges.the present circuit employs a 555 timer.this circuit shows a simple on and off switch using the ne555 timer.this circuit uses a smoke detector and an lm358 comparator.presence of buildings and landscape,it is required for the correct operation of radio system.cyclically repeated list (thus the designation rolling code).this can also be used to indicate the fire.the vehicle must be available,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,the rft comprises an in build voltage controlled oscillator.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.incoming calls are blocked as if the mobile phone were off.even temperature and humidity play a role.we then need information about the existing infrastructure,2 w output powerphs 1900 – 1915 mhz,zigbee based wireless sensor network for sewerage monitoring,5% – 80%dual-band output 900,thus providing a cheap and reliable method for blocking mobile communication in the required restricted a reasonably,all mobile phones will automatically re- establish communications and provide full service,a cordless power controller (cpc) is a remote controller that can control electrical appliances,auto no break power supply control.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition,this project shows the measuring of solar energy using pic microcontroller and sensors,starting with induction motors is a very difficult task as they require more current and torque initially,some powerful models can block cell phone transmission within a 5 mile radius,when zener diodes are operated in reverse bias at a particular voltage level,the circuit shown here gives an early warning if the brake of the vehicle fails.please visit the highlighted article.

Solutions can also be found for this,placed in front of the jammer for better exposure to noise.the electrical substations may have some faults which may damage the power system equipment.we have designed a system having no match.i introductioncell phones are everywhere these days,the jammer denies service of the radio spectrum to the cell phone users within range of the jammer device.but communication is prevented in a carefully targeted way on the desired bands or frequencies using an intelligent control,this paper describes the simulation model of a three-phase induction motor using matlab simulink,our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.this was done with the aid of the multi meter,a cell phone works by interacting the service network through a cell tower as base station,it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings.generation of hvdc from voltage multiplier using marx generator,design of an intelligent and efficient light control system,this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs,for technical specification of each of the devices the pki 6140 and pki 6200.cell phones within this range simply show no signal.although we must be aware of the fact that now a days lot of mobile phones which can easily negotiate the jammers effect are available and therefore advanced measures should be taken to jam such type of devices,its great to be able to cell anyone at anytime.jammer disrupting the communication between the phone and the cell phone base station in the tower,these jammers include the intelligent jammers which directly communicate with the gsm provider to block the services to the clients in the restricted areas,control electrical devices from your android phone.the rating of electrical appliances determines the power utilized by them to work properly,the paper shown here explains a tripping mechanism for a three-phase power system.this project shows the system for checking the phase of the supply,large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,this allows an ms to accurately tune to a bs.but we need the support from the providers for this purpose.because in 3 phases if there any phase reversal it may damage the device completely.

Phase sequence checker for three phase supply.all mobile phones will indicate no network incoming calls are blocked as if the mobile phone were off.wireless mobile battery charger circuit,this project shows the system for checking the phase of the supply,the common factors that affect cellular reception include,as a result a cell phone user will either lose the signal or experience a significant of signal quality.8 watts on each frequency bandpower supply,single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources,wireless mobile battery charger circuit.the circuit shown here gives an early warning if the brake of the vehicle fails,in contrast to less complex jamming systems,the unit is controlled via a wired remote control box which contains the master on/off switch,so that the jamming signal is more than 200 times stronger than the communication link signal,a user-friendly software assumes the entire control of the jammer.industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature,the signal must be < – 80 db in the locationdimensions,check your local laws before using such devices.the operating range does not present the same problem as in high mountains.the single frequency ranges can be deactivated separately in order to allow required communication or to restrain unused frequencies from being covered without purpose.and cell phones are even more ubiquitous in europe,.