This device is not one I would choose to use due to how it hides almost inside your ear. This particular device is a two-way micro earpiece which is practically invisible. It can connect to many mobile devices to receive the signals with the 2.5mm audio output. It costs $650 and would be good for security type operations where the user doesn’t mind the possibility of loosing it inside their head.
Via: SlashGear
I want to buy it. contact me please . I stay Thailand. cash