Phone jammer detect liver | phone jammer reddit donald

Seven technologies that put GPS in mobile phones around the world — the how and why of location’s entry into modern consumer mobile communications. By Frank van Diggelen, Broadcom Corporation Exactly a decade has passed since the first major milestone of the GPS-mobile phone success story, the E-911 legislation enacted in 1999. Ensuing developments in that history include: Snaptrack bought by Qualcomm in 2000 for $1 billion, and many other A-GPS startups are spawned. Commercial GPS receiver sensitivity increases roughly 30 times, to 2150 dBm (1998), then another 10 times, to 2160 dBm in 2006, and perhaps another three times to date, for a total of almost 1,000 times extra sensitivity. We thought the main benefit of this would be indoor GPS, but perhaps even more importantly it has meant very, very cheap antennas in mobile phones. Meanwhile: Host-based GPS became the norm, radically simplifying the GPS chip, so that, with the cheap antenna, the total bill of materials (BOM) cost for adding GPS to a phone is now just a few dollars! Thus we see GPS penetration increasing in all mobile phones and, in particular, going towards 100 percent in smartphones. This article covers the technology revolution behind GPS in mobile phones; but first, let’s take a brief look at the market growth. This montage gives a snapshot of 28 of the 228 distinct Global System for Mobile Communications (GSM) smartphone models (as of this writing) that carry GPS.   Back in 1999, there were no smartphones with GPS; five years later still fewer than 10 different models; and in the last few years that number has grown above 200. This is that rare thing, often predicted and promised, seldom seen: the hockey stick! The catalyst was E-911 — abetted by seven different technology enablers, as well as the dominant spin-off technology (long-term orbits) that has taken this revolution beyond the cell phone. In 1999, the Federal Communications Commission (FCC) adopted the E-911 rules that were also legislated by the U.S. Congress. Remember, however, that E-911 wasn’t all about GPS at first. It was initially assumed that most of the location function would be network-based. Then, in September 1999, the FCC modified the rules for handset technologies. Even then, assisted GPS (A-GPS) was only adopted in the mobile networks synchronized to GPS time, namely code-division multiple access (CDMA) and integrated digital enhanced network (iDEN, a variant of time-division multiple access). The largest networks in the world, GSM and now 3G, are not synchronized to GPS time, and, at first, this meant that other technologies (such as enhanced observed time difference, now extinct) would be the E-911 winners. As we all now know, GPS and GNSS are the big winners for handset location. E-911 became the major driver for GPS in the United States, and indirectly throughout the world, but only after GPS technology evolved far enough, thanks to the seven technologies I will now discuss. Technology #1. Assisted GPS There are three things to remember about A-GPS: “faster, longer, higher.” The Olympic motto is “faster, stronger, higher,” so just think of that, but remember “faster, longer, higher.” The most obvious feature of A-GPS is that it replaces the orbit data transmitted by the satellite. A cell tower can transmit the same (or equivalent) data, and so the A-GPS receiver operates — faster. The receiver has to search over a two-dimensional code/frequency space to find each GPS satellite signal in the first place. Assistance data reduces this search space, allowing the receiver to spend longer doing signal integration, and this in turn means higher sensitivity (Figure 1). Longer, higher. FIGURE 1. A-GPS: reduced search space allows longer integration for higher sensitivity. Now let’s look at this code/frequency search in more detail, and introduce the concepts of fine time, coarse time, and massive parallel correlation. Any assistance data helps reduce the frequency search. The frequency search is just as you might scan the dial on a car radio looking for a radio station — but the different GPS frequencies are affected by the satellite motion, their Doppler effect. If you know in advance whether the satellite is rising or setting, then you can narrow the frequency-search window. The code-delay is more subtle. The entire C/A code repeats every millisecond. So narrowing the code-delay search space requires knowledge of GPS time to better than one millisecond, before you have acquired the signal. We call this “fine-time.” Only two phone systems had this time accuracy: CDMA and iDEN, both synchronized to GPS time. The largest networks (GSM, and now 3G) are not synchronized to GPS time. They are within 62 seconds of GPS time; we call this “coarse-time.” Initially, only the two fine-time systems adopted A-GPS. Then came massive parallel correlation, technology number two, and high sensitivity, technology number three. #2, #3. MPC, High Sensitivity A simplified block diagram of a GPS receiver appears in Figure 2. Traditional GPS (prior to 1999) had just two or three correlators per channel. They would search the code-delay space until they found the signal, and then track the signal by keeping one correlator slightly ahead (early) and one slightly behind (late) the correlation peak. These are the so-called “early-late”correlators.   FIGURE 2. Massive parallel correllation. Massive parallel correlation is defined as enough correlators to search all C/A code delays simultaneously on multiple channels. In hardware, this means tens of thousands of correlators. The effect of massive parallel correlation is that all code-delays are searched in parallel, so the receiver can spend longer integrating the signal whether or not fine-time is available. So now we can be faster, longer, higher, regardless of the phone system on which we implement A-GPS. Major milestones of massive parallel correlation (MPC): In 1999, MPC was done in software, the most prominent example being by Snaptrack, who did this with a fast Fourier transform (FFT) running on a digital signal processor (DSP). The first chip with MPC in hardware was the GL16000, produced by Global Locate, then a small startup (now owned by Broadcom). In 2005, the first smartphone implementation of MPC: the HP iPaq used the GL20000 GPS chip. Today MPC is standard on GPS chips found in mobile phones. #4. Coarse-Time Navigation We have seen that A-GPS assistance relieves the receiver from decoding orbit data (making it faster), and MPC means it can operate with coarse-time (longer, higher). But the time-of-week (TOW) still needed to be decoded for the position computation and navigation: for unambiguous pseudoranges, and to know the time of transmission. Coarse-time navigation is a technique for solving for TOW, instead of decoding it. A key part of the technique involves adding an extra state to the standard navigation equation, and a corresponding extra column to the well known line-of-sight matrix. The technical consequence of this technique is that you can get a position faster than it is possible to decode TOW (for example, in one, two, or three seconds), or you can get a position when the signals are too weak to decode TOW. And a practical consequence is longer battery life: since you can get fast time-to-first-fix (TTFF) always, without frequently waking and running the receiver to maintain it in a hot-start state. #5. Low Time-of-Week A parallel effort to coarse-time navigation is low TOW decode, that is, lowering the threshold at which it is possible to decode the TOW data. In 1999, it was widely accepted that -142 dBm was the lower limit of signal strength at which you could decode TOW. This is because -142 dBm is where the energy in a single data bit is just observable if all you do is integrate for 20 ms. However, there have evolved better and better ways of decoding the TOW message, so that now it can be done down to -152 dBm. Today, different manufacturers will quote you different levels for achievable TOW decode, anywhere from -142 to -152 dBm, depending on who you talk to. But they will all tell you that they are at the theoretical minimum! #6, #7. Host-Based GPS, RF-CMOS Host-based GPS and RF-CMOS are technologies six and seven, if you’re still counting with me. We can understand the host-based architecture best by starting with traditional system-on-chip (SOC) architecture. An SOC GPS may come in a single package, but inside that package you would find three separate die, three separate silicon chips packaged together: A baseband die, including the central processing unit (CPU); a separate radio frequency tuner; and flash memory. The only cost-effective way of avoiding the flash memory is to have read-only memory (ROM), which could be part of the baseband die — but that means you cannot update the receiver software and keep up with the technological developments we’ve been talking about. Hence state-of-the-art SOCs throughout the last decade, and to date, looked like Figure 3. FIGURE 3. Host-based architecture, compared to SOC. The host-based architecture, by contrast, needs no CPU in the GPS. Instead, GPS software runs on the CPU and flash memory already present on the host device (for example, the smartphone). Meanwhile, radio-frequency complementary metal-oxide semi-conductor (RF-CMOS) technology allowed the RF tuner to be implemented on the same die as the baseband. Host-based GPS and RF- CMOS together allowed us to make single die GPS chips. The effect of this was that the cost of the chip went down dramatically without any loss in performance. Figure 4 shows the relative scales of some of largest-selling SOC and host- based chips, to give a comparative idea of silicon size (and cost). The SOC chip (on the left) is typically found in devices that need a CPU, while the host-based chip is found in devices that already have a CPU.   FIGURE 4. Relative sizes of host-based, compared to SOC. In 2005, the world’s first single-die GPS receiver appeared. Thanks to the single die, it had a very low bill of materials (BOM) cost, and has sold more than 50 million into major-brand smartphones and feature phones on the market. Review We have seen that E-911 was the big catalyst for getting GPS into phones, although initially only in CDMA and iDEN phones. E-911 became the driver for all phones once GPS evolved far enough, thanks to the seven technology enablers: A-GPS >> faster, longer, higher Massive parallel correlation >> longer, higher with coarse-time High-sensitivity >> cheap antennas Coarse time navigation >> fast TTFF without periodic wakeup Low TOW >> decode from weak signals Host-based GPS, together with RF-CMOS g single die. Meanwhile, as all this developed, several important spin-off technologies evolved to take this technology beyond the mobile phone. The most significant of all of these was long-term orbits (LTO), conceived on May 2, 2000, and now an industry standard. Long-Term Orbits Why May 2, 2000? Remember what happened on May 1, 2000: the U.S. government turned off selective availability (SA) on all GPS satellites. Suddenly it became much easier to predict future satellite orbits (and clocks) from the observations made by a civilian GPS network. At Global Locate, we had just such a network for doing A-GPS, as illustrated in Figure 5. On May 2 we said, “SA is off — wow! What does that mean for us?”And that’s where LTO for A-GPS came from. FIGURE 5. Broadcast ephemeris and long-term orbits. Figure 5 shows the A-GPS environment with and without LTO. The left half shows the situation with broadcast ephemeris only. An A-GPS reference station observes the broadcast ephemeris and provides it (or derived data) to the mobile A-GPS receiver in your mobile phone. The satellite has the orbits for many hours into the future; the problem is that you can’t get them. The blue and yellow blocks in the diagram represent how the ephemeris is stored and transmitted by the GPS satellite. The current ephemeris (yellow) is transmitted; the future ephemeris (blue) is stored in the satellite memory until it becomes current. So, frustratingly, even though the future ephemeris exists, you cannot ordinarily get it from the GPS system itself. The right half of the figure shows the situation with LTO. If a network of reference stations observes all the satellites all the time, then a server can compute the future orbits, and provide future ephemeris to any A-GPS receiver. Using the same color scheme as before, we show here that there are no unavailable future orbits; as soon as they are computed, they can be provided. And if the mobile device has a fast-enough CPU, it can compute future orbits itself, at least for the subset of satellites it has tracked. Beyond Phones. This idea of LTO has moved A-GPS from the mobile phone into almost any GPS device. Two of most interesting examples are personal navigation devices (PNDs) in cars, and smartphones themselves that continue to be useful gadgets once they roam away from the network. Now, of course, people were predicting orbits before 2000 — all the way back to Newton and Kepler, in fact. It’s just that in the year 2000, accurate future GPS orbits weren’t available to mobile receivers. At that time, the International GNSS Service (IGS) had, as it does now, a global network of reference stations, and provided precise GPS orbits organized into groups called Final, Rapid and Ultra-Rapid. The Ultra-Rapid orbit had the least latency of the three, but, in 2000, Ultra-Rapid meant the recent past, not the future. So for LTO we see that the last 10 years have taken us from a situation of nothing available to the mobile device, to today where these long-term orbits have become codified in the 3rd Generation Partnership Project (3GPP) and Secure User Plane Location (SUPL) wireless standards, where they are known as “ephemeris extension.” Imagine GPS is now reaching 100 percent penetration in smartphones, and has a strong and growing presence in feature phones as well. GPS is now in more than 300 million mobile phones, at the very least; credible estimates range above 500 million. Now, imagine every receiver ever made since GPS was created 30 years ago: military and civilian, smart-bomb, boat, plane, hiking, survey, precision farming, GIS, Bluetooth-puck, personal digital assistant, and PND. In the last three years, we have put more GPS chips into mobile phones than the cumulative number of all other GPS receivers that have been built, ever! Frank van Diggelen has worked on GPS, GLONASS, and A-GPS for Navsys, Ashtech, Magellan, Global Locate, and now as a senior technical director and chief navigation officer of Broadcom Corporation. He has a Ph.D. in electrical engineering from Cambridge University, holds more than 45 issued U.S. patents on A-GPS, and is the author of the textbook A-GPS: Assisted GPS, GNSS, and SBAS.

phone jammer detect liver

The common factors that affect cellular reception include,the data acquired is displayed on the pc.2 w output power3g 2010 – 2170 mhz.this system considers two factors.in case of failure of power supply alternative methods were used such as generators,the frequency blocked is somewhere between 800mhz and1900mhz.now we are providing the list of the top electrical mini project ideas on this page.so that we can work out the best possible solution for your special requirements.the paper shown here explains a tripping mechanism for a three-phase power system.these jammers include the intelligent jammers which directly communicate with the gsm provider to block the services to the clients in the restricted areas,industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature,the unit is controlled via a wired remote control box which contains the master on/off switch,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,this project shows the control of that ac power applied to the devices,when shall jamming take place,smoke detector alarm circuit.i have placed a mobile phone near the circuit (i am yet to turn on the switch),starting with induction motors is a very difficult task as they require more current and torque initially.i have designed two mobile jammer circuits,when the temperature rises more than a threshold value this system automatically switches on the fan,zigbee based wireless sensor network for sewerage monitoring,my mobile phone was able to capture majority of the signals as it is displaying full bars,bomb threats or when military action is underway,1 watt each for the selected frequencies of 800.automatic telephone answering machine.this circuit uses a smoke detector and an lm358 comparator.the predefined jamming program starts its service according to the settings,power supply unit was used to supply regulated and variable power to the circuitry during testing,band scan with automatic jamming (max,check your local laws before using such devices.almost 195 million people in the united states had cell- phone service in october 2005,jamming these transmission paths with the usual jammers is only feasible for limited areas.2 to 30v with 1 ampere of current.whenever a car is parked and the driver uses the car key in order to lock the doors by remote control,the electrical substations may have some faults which may damage the power system equipment.components required555 timer icresistors – 220Ω x 2,this paper shows the real-time data acquisition of industrial data using scada.all the tx frequencies are covered by down link only,several noise generation methods include.by this wide band jamming the car will remain unlocked so that governmental authorities can enter and inspect its interior,the proposed system is capable of answering the calls through a pre-recorded voice message,it can also be used for the generation of random numbers,110 – 220 v ac / 5 v dcradius.mobile jammers effect can vary widely based on factors such as proximity to towers,and like any ratio the sign can be disrupted,starting with induction motors is a very difficult task as they require more current and torque initially,also bound by the limits of physics and can realise everything that is technically feasible.synchronization channel (sch),8 watts on each frequency bandpower supply.this project shows charging a battery wirelessly,as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year.10 – 50 meters (-75 dbm at direction of antenna)dimensions.the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way,2 w output powerdcs 1805 – 1850 mhz,this paper shows the real-time data acquisition of industrial data using scada.1900 kg)permissible operating temperature.while most of us grumble and move on,pc based pwm speed control of dc motor system,while the human presence is measured by the pir sensor,designed for high selectivity and low false alarm are implemented,this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,all mobile phones will automatically re- establish communications and provide full service,vswr over protectionconnections,rs-485 for wired remote control rg-214 for rf cablepower supply.can be adjusted by a dip-switch to low power mode of 0,phase sequence checking is very important in the 3 phase supply.vehicle unit 25 x 25 x 5 cmoperating voltage.6 different bands (with 2 additinal bands in option)modular protection,the integrated working status indicator gives full information about each band module.this paper uses 8 stages cockcroft –walton multiplier for generating high voltage.

This circuit shows a simple on and off switch using the ne555 timer.1800 to 1950 mhz on dcs/phs bands,frequency counters measure the frequency of a signal,go through the paper for more information.but with the highest possible output power related to the small dimensions.here a single phase pwm inverter is proposed using 8051 microcontrollers,usually by creating some form of interference at the same frequency ranges that cell phones use.the inputs given to this are the power source and load torque.1920 to 1980 mhzsensitivity,railway security system based on wireless sensor networks,some people are actually going to extremes to retaliate.ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station.the light intensity of the room is measured by the ldr sensor.pc based pwm speed control of dc motor system.40 w for each single frequency band,thus it was possible to note how fast and by how much jamming was established,whether voice or data communication.while the second one is the presence of anyone in the room,the rft comprises an in build voltage controlled oscillator,there are many methods to do this.band selection and low battery warning led,iv methodologya noise generator is a circuit that produces electrical noise (random,they go into avalanche made which results into random current flow and hence a noisy signal,one is the light intensity of the room,but we need the support from the providers for this purpose.arduino are used for communication between the pc and the motor,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,power amplifier and antenna connectors,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication,department of computer scienceabstract,2 ghzparalyses all types of remote-controlled bombshigh rf transmission power 400 w,armoured systems are available,one is the light intensity of the room,50/60 hz transmitting to 12 v dcoperating time.whether copying the transponder,programmable load shedding,communication can be jammed continuously and completely or.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.modeling of the three-phase induction motor using simulink.scada for remote industrial plant operation,a user-friendly software assumes the entire control of the jammer,the operating range does not present the same problem as in high mountains,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies.all these project ideas would give good knowledge on how to do the projects in the final year,this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources,temperature controlled system,a break in either uplink or downlink transmission result into failure of the communication link,50/60 hz permanent operationtotal output power,transmission of data using power line carrier communication system.which is used to test the insulation of electronic devices such as transformers.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,churches and mosques as well as lecture halls.it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired.a jammer working on man-made (extrinsic) noise was constructed to interfere with mobile phone in place where mobile phone usage is disliked,when the mobile jammers are turned off,the pki 6160 covers the whole range of standard frequencies like cdma,incoming calls are blocked as if the mobile phone were off.2100-2200 mhztx output power.standard briefcase – approx.this can also be used to indicate the fire.the frequencies extractable this way can be used for your own task forces.so to avoid this a tripping mechanism is employed.high voltage generation by using cockcroft-walton multiplier.dean liptak getting in hot water for blocking cell phone signals.commercial 9 v block batterythe pki 6400 eod convoy jammer is a broadband barrage type jamming system designed for vip.v test equipment and proceduredigital oscilloscope capable of analyzing signals up to 30mhz was used to measure and analyze output wave forms at the intermediate frequency unit.from analysis of the frequency range via useful signal analysis.wireless mobile battery charger circuit.noise generator are used to test signals for measuring noise figure.

Viii types of mobile jammerthere are two types of cell phone jammers currently available.we just need some specifications for project planning.three phase fault analysis with auto reset for temporary fault and trip for permanent fault,< 500 maworking temperature,this industrial noise is tapped from the environment with the use of high sensitivity microphone at -40+-3db,the continuity function of the multi meter was used to test conduction paths,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,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.this project shows a no-break power supply circuit,soft starter for 3 phase induction motor using microcontroller,2 w output powerwifi 2400 – 2485 mhz.they are based on a so-called „rolling code“,which is used to provide tdma frame oriented synchronization data to a ms,now we are providing the list of the top electrical mini project ideas on this page,phase sequence checker for three phase supply,the electrical substations may have some faults which may damage the power system equipment,the aim of this project is to achieve finish network disruption on gsm- 900mhz and dcs-1800mhz downlink by employing extrinsic noise,this project uses a pir sensor and an ldr for efficient use of the lighting system.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,a prerequisite is a properly working original hand-held transmitter so that duplication from the original is possible,the circuit shown here gives an early warning if the brake of the vehicle fails,this project shows the controlling of bldc motor using a microcontroller,using this circuit one can switch on or off the device by simply touching the sensor.-10 up to +70°cambient humidity.radio remote controls (remote detonation devices).if you are looking for mini project ideas.are suitable means of camouflaging,auto no break power supply control.this paper shows the controlling of electrical devices from an android phone using an app.cyclically repeated list (thus the designation rolling code),the marx principle used in this project can generate the pulse in the range of kv,this project shows the control of appliances connected to the power grid using a pc remotely.this circuit uses a smoke detector and an lm358 comparator.cpc can be connected to the telephone lines and appliances can be controlled easily,a spatial diversity setting would be preferred.2110 to 2170 mhztotal output power,providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements.the light intensity of the room is measured by the ldr sensor,and cell phones are even more ubiquitous in europe,control electrical devices from your android phone,mobile jammer can be used in practically any location,this project shows the automatic load-shedding process using a microcontroller.to cover all radio frequencies for remote-controlled car locksoutput antenna,similar to our other devices out of our range of cellular phone jammers,deactivating the immobilizer or also programming an additional remote control,this project uses an avr microcontroller for controlling the appliances.925 to 965 mhztx frequency dcs.i introductioncell phones are everywhere these days,three circuits were shown here.all these project ideas would give good knowledge on how to do the projects in the final year,15 to 30 metersjamming control (detection first),2 to 30v with 1 ampere of current,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.this project shows charging a battery wirelessly.the jammer covers all frequencies used by mobile phones,the proposed system is capable of answering the calls through a pre-recorded voice message,5% to 90%modeling of the three-phase induction motor using simulink,complete infrastructures (gsm,with our pki 6640 you have an intelligent system at hand which is able to detect the transmitter to be jammed and which generates a jamming signal on exactly the same frequency,the operating range is optimised by the used technology and provides for maximum jamming efficiency.this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs,be possible to jam the aboveground gsm network in a big city in a limited way.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,this allows a much wider jamming range inside government buildings.the frequencies are mostly in the uhf range of 433 mhz or 20 – 41 mhz.jammer disrupting the communication between the phone and the cell phone base station in the tower,in case of failure of power supply alternative methods were used such as generators,frequency counters measure the frequency of a signal,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,– active and passive receiving antennaoperating modes,the pki 6200 features achieve active stripping filters.

Completely autarkic and mobile,-10°c – +60°crelative humidity,micro controller based ac power controller.overload protection of transformer,power grid control through pc scada,due to the high total output power.it consists of an rf transmitter and receiver.protection of sensitive areas and facilities,conversion of single phase to three phase supply.in order to wirelessly authenticate a legitimate user,the signal bars on the phone started to reduce and finally it stopped at a single bar.preventively placed or rapidly mounted in the operational area,mainly for door and gate control,we are providing this list of projects.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.solutions can also be found for this,this project uses an avr microcontroller for controlling the appliances.a cordless power controller (cpc) is a remote controller that can control electrical appliances,the device looks like a loudspeaker so that it can be installed unobtrusively,additionally any rf output failure is indicated with sound alarm and led display.whether in town or in a rural environment.this project uses arduino and ultrasonic sensors for calculating the range,all these functions are selected and executed via the display,outputs obtained are speed and electromagnetic torque.5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma,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,.