What in the package:
This gadget is for covert communication, applied to receiving instruction secretly.
It's popular with security men, casino playing, exam cheating.
How to use:
Wear the coil on neck, hide it under clothes, connect the 3.5mm jack with a mute phone or walkie talkie, mp3 player and so on.
Install 1 piece battery into 007 earpiece, then put deeply in ear, make sure it's invisible. It has long standby time and max. 5 hrs working time.