This Invisible Micro Earpiece listening kit is scarily clever. The earpiece is actually small enough to fit completely inside your ear canal, which makes it the smallest of its type in the world. The developers have achieved this by removing any speaker or battery requirement, instead the thing vibrates the audio directly to your auditory system, using what they call ‘passive’ vibration.
The user has to wear an induction loop around their neck (presumably hidden under a shirt or jacket) and carry an ultra sensitive microphone panel to do the actual sound pickup, so it’s not completely battery and bulk free. The final touch is the fact that it’s Bluetooth compatible, and so can transmit the sound to any Bluetooth mobile phone or other receiver within a 10 metre radius. We said it was clever. Priced at $170.00.
The ear unit is a passive vibration unit, that is why it does not need any own battery power. The sound quality itself is music suitable clear, it does not noise at all. However, keep in mind, that this solution was originally designed to be used under normal room conditions. You should not expect an actual performance volume of the security kit to be the same loud as you, perhaps, got used to listening to music with stereo headphones. We guarantee this would be enough to hear clearly under normal room environment, but you will experience a trouble or not be able to use it in a loud environment.
What's that in my ear? Lost it again. "DOCTOR!!!!!"
There are now micro fm earpiece which directly receives the signal from the walkie talkie without wires, wallets and other accessories on you. Only search in google fm micro earpiece