Invisible Bluetooth Earpiece + Signal Button SPY Kit for Students Invisible

New and Exclusive design, Build-in 3.5 Watt amplifier. Supports all kinds of wireless invisible earpiece. Output very loud sounds. Volume is adjustable. 2 Colors of black and beige are available. The smallest high quality hidden Spy Earpiece. It's tiny size Dia7xH11mm makes it completely invisible in the ear canal. Works with all of the inductive transmitters. It has new advanced battery holder, no worry about broken battery holder any more. The smallest hidden Spy Earpiece is with an optimum anatomic design. It allows inexperience users easily wear it. .

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