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What kind of signal does a phone jammer block?

Known as cell jammers, signal blockers, GPS jammers, or text stoppers, a cell phone signal jammer holds up the radio frequency in a given area, creating a sort of signal traffic jam that blocks all communication.

What is the best cell phone signal blocker for school?

According to the interference frequency band classification: mobile phone signal jamming. According to appearance classification: Handheld telephone blocker, desktop cellphone blocker device, mini type mobile jammer, hidden cell phone signal blocker.

What are the classification of mobile phone signal blockers?

All Cell Phone Signal Jammer 6 Bands WiFi GPS This 6 bands mobile phone signal blocker can jam al cell phone signal: 2G, 3G, 4G, WiFi, GPS. Is the best choice for school, the examination room, office. Can be isolated from the signal to ensure information security.

What is Desktop 4 Bands GSM 3G 4G blocker device?

2018 most popular high power desktop Wi-Fi/Bluetooth Jammers that interferes with GSM, 3G, 4G, wireless signals.During the signal jammer woking, stopped all the phone device signals with the radius range of 40m. Desktop 4 antennas wifi signal blocker can jamming GSM 3G WIFI GPS signal, and 315MHz 433MHz 868MHz remote control frequency.