Signal scrambling anti cheat

Portable CDMA GSM 3G Mobile Phone Jammer Blocks GPS WIFI 2.4G 433MHz 315MHz 868MHz Frequency

old-price: $339.99

new-price: $169.99

50% OFF

Desktop High Power 8 Bands Signal Shieding Cell Phone Jammer Remote Control

old-price:$790.89

new-price: $580.89

27% OFF

In recent years, there has been a precedent of communication equipment fraud in the previous college entrance examinations. In order to completely eliminate the occurrence of such phenomena, signal jammers have been widely adopted.

So what is the principle of the jammer used in the college entrance examination? In fact, this is equal to the time it takes for your phone to send and receive messages. The phone jammer is like an oversized horn. The output of the "noise signal" is so large that your phone cannot hear the "mouth", and it will call Jammer. In short, the job of the shielding layer is far from blocking cell phone signals, but blocking signals. It is equivalent to using useful electromagnetic signals in a large number of unwanted signals.

Although the phone can be used for wireless communication equipment at any time, it still has an invisible wire drag than a mobile phone base station. The first step for a mobile phone to make a call or answer a call is to first establish a connection with a nearby mobile phone base station. If you use your left hand and right hand to call the mobile phone separately, and use the left hand of the mobile phone to call the right hand mobile phone, the electromagnetic waves of the mobile phone will not be transmitted directly from the left hand to the right hand. Then to the right phone (except Bluetooth) there is a big circle.