1)Covert wireless earbud;
2) Easy-to-wear covert inductive  neckloop;
3) Small top PTT design for covert and convenient operation.

Receiver Specifications:
Sound Pressure Level: 92±3dB @1KHz 10mW
Distortion (typical): ≤2%

Microphone specifications:
Sensitivity: -32±3dB@1kHz,0dB=1V/pa
Impedance: ≤2.2kΩ@1kHz
Operating Voltage: 1–10VDC
PTT Life Circle: ≥100,000 times
Battery Use Time: ≥60h

Operating Temperature: 0 to 40℃

Application: for users engaged in public/personal security.
Applicable to: PD70X, PD78X, PT580H and PT-580