The spy earphone about the size soybeans, Add to ear can be completely invisible, not to be found. Apply to the preservation of staff,
a criminal investigation officers, magic show, actor, FBI CIA etc.
This product of the working methods shown in the figure above, the first to use long-distance transmission of radio signals and then disguised as a wallet with the receiver to receive signals the wallet receive the signal,
longer sent to the ears of the spy earphone, Operation is very simple, but attention should be paid to purse receiver can not be too far
away from the invisible headset, clothes pockets on the best results.

spy earphone designed to be very small, just before use installed on the size of a grain of rice button battery(Battery type :337 SR416SW) can be used. This product is non-switch design, to remove the battery When not in use
Receiver in the wallet, by the circuit, battery and a coil of vibration, when used installed on the battery, then open the switch, began to
work.