Super Mini Spy earpiece - This package includes only earpieces - *earpiece alone can't work. It will need some transmission module for it's working*
 

This FBI   Wireless Earphone is an electromagnetic wave inductive and receiving device designed to fit the human ear canal exactly. It composes a covert signal transfer and receiver system with an electromagnetic wave inductive module.
Technical specification
     - Mini magnetic wireless earpiece  receives a signal 
by inductive coil,
across electromagnetic fields
     - Receiving distance: 50-70 cm
     - with battery
     - Battery life: about 5 hours
     - Audio bandwidth: from 300 Hz to 4 KHz
     - Distortion: <2%
     - Size: 3x5x7mm
     - Working frequency: all frequencies
     - Distance between inductive coil and Mini wireless earpiece: 
about 70-100 cm.
 
 
What is that for?
Application
The advantage of using state-of-the-art technology is fundamental in situations where covert communication is required.
This extra small wireless micro earpiece and sensitive microphone permit you to receive real-time information or communications without being noticed. Law enforcement officers, Private investigators, Businessmen, Gamblers, and Politicians, all find a use for this incredible new device.
Work Principle
The covert earpiece is reception equipment driven by electromagnetic induction used in conjunction with drive equipment hidden in a wallet or a pocket, such as a cell phone, an interphone, a radio, etc.


Inductive loop (Works with a cell phone)
The inductive loop used in conjunction with the earpiece is one of the mobile phone accessories.
Its work principle is the same as one-wired mobile phone inductive loops.

How to use
If necessary, wear the skin colour loop on your neck or under your clothes.
Connect the plug to your cell phone slot and talk into the microphone normally and hands-free.

Box contains - 
2 X spherical 4 mm Magnetic earpiece
2 X Cylindrical 4 mm Magnetic earpiece 
1 Magnetic Stick for taking out earpiece from ear.