The June of the college entrance examination is less than a hundred days away, and it is also the last moment of the sprint for the college entrance examination. The examination room in the information age is naturally indispensable with the addition of Cell Phone Jammer Out Of Tv Remote . With this instrument, at least it is almost impossible to cheat on a mobile phone. So what kind of instrument is it? cell phone jammer Mainly for all kinds of examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, governments, finance, prisons, public security, military centers and other places where the use of mobile phones is prohibited. On such occasions, the signal will no longer be transmitted with it.
The Cell Phone Jammer Out Of Tv Remote currently on the market can limit cell phone signals that are 200 meters away from the launch pad and have a radius of >20 meters. The shielding radius is adjustable, it only shields mobile phone signals without affecting other electronic devices. Save electric energy, the Power is 20W. When the mobile phone is working, it is within a certain frequency range, the mobile phone and the base station are connected by radio waves, and the data and sound transmission are completed with a certain baud rate and modulation method. For this communication principle, the scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone is manifested as a search network, no signal, no service system and other phenomena. Common mobile phone signal jammers on the market have operating frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz and 1900~1990MHz, etc. The operating frequency bands are CDMA800, GSM900, DCS1800, and PCS1900. It can control the range of about 40 meters in diameter, using DC-DC converter input voltage and 5V output voltage.
