When candidates cheat, when the sender and receiver communicate with each other inside and outside the test room, they must first convert "valuable information" such as ABCD answers into binary numbers, encode, and encrypt if necessary, and the frequency band used will be processed. Modulation, the information is loaded on the electromagnetic wave signal, sent by the transmitter antenna, and the other party in the examination room decodes and demodulates to restore the ABCD information. However, with this cell phone jammer , the signaling method used by both cheating parties can be figured out in seconds. Not only is the signal detected, but the information inside can even be directly extracted and heard in the conversation. say what. No matter how sophisticated the equipment used by cheaters, the "near big and far small" nature of electromagnetic waves is bound to exist. Signal emissions can be calculated based on the distance and strength of the signal by relying on multiple Cell Phone Blocker Plans Free placed in different locations. The location of the device, the answer launcher was captured on the spot.
As we all know, people do not need to block all cell phone signals under all circumstances. Sometimes they just want to block certain phone bands and affect other bands from working. In the past, such a goal may have been difficult to achieve, as there were few Cell Phone Blocker Plans Free designs with adjustable buttons, but now if you need to determine the shielding distance and shielding frequency according to the actual situation, you can use the adjustable signal blocker to help you, Here you will have a chance to see this "5 Antenna Adjustable 4G Cell Phone Signal Jammer", then you will know more details of this 4G cell phone signal jammer and get the overall information. This is a 4G cell phone signal blocker that cuts off CDMA, GSM, DCS, PCS and 4G signals at the same time when you need them. On the other hand, this high-power 4G cell phone jammer is also called an adjustable cell phone jammer, because you can determine which frequency band to block by adjusting the power of the frequency band, because this 4G cell phone jammer is equipped with an adjustable cell phone jammer. buttons. With such a design, each of the 5 frequency bands can be controlled individually, which is very convenient for those who need it.
