Exam cheating near field detector (exam anti *)

  Cheaters often use micro passive earphones to receive messages in the examination room
The cheating near-field detector (exam anti *) adopts the audio wireless signal near-field detection technology to receive the same voice messages as cheaters in the examination room, so as to realize anti cheating
Parameters:
Received signal: unmodulated voice signal with frequency of 0
1 ~ 15KHz
Reliable working distance: 5m
Audio output: dual channel
Charging voltage: 5VDC
characteristic:
The host is small in size, light in weight and easy to carry;
The antenna has beautiful shape and high sensitivity;
Original Sony noise reduction earphones effectively protect users' hearing health
Built in large capacity lithium battery to ensure long-term reliable operation