The wireless transmitter earphone is about the size soybeans, Completely invisible and impossible to detect. Use for undercover by major government agencies.
Please see the working methods shown in the figure above, the first to use long-distance transmission of radio signals, and then received by the covert receiver disguised as a wallet with the receiver to receive signals, the received signal is sent to the covert wireless earphone, Operation is very simple.
The covert earphone is designed to be very small, just before use, install the grain size button battery (Battery type :337 SR416SW) can be used. This product is non-switch design, pls remove the battery When not in use.
Receiver built in the covert wallet, the circuit, battery and a coil of vibration to let you know that the system is working, just open the switch to began to receive transmissions.