Signal alarm is one of the security equipment, designed for signal inspection. The orientation of the signal can be determined.
June 13, 2022
Can signal alerters replace cell phone jammers?
Can signal alerters replace cell phone jammers? Signal alerters are available that indicate the presence of a cell phone signal. These have been used in hospitals where cell phone signals could interfere with sensitive medical equipment. When a signal is detected, users are asked to turn off their phones. Physically block signal transmission and reception. [...]
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