Features:

1. The environmental protection ear hanger made by TPE: Be flexible and don't hurt the skin.
2. Clear sound quality, highly secrecy, and keep the external a quiet environment.
3. Separated microphone in most popular PTT. PTT button and earpiece for discreet communication .
4. All have Kevlar reinforced cable, transparent tube (made by PVC plastic) make the voice clearer .
5. Clear sound quality, noise eliminated.

Speaker:
Size: 23mm
Sound Pressure Level: 102dB±3dB
Impedance: 32Ω±15%
Audio output: 100mW

Microphone:
Size: 9.7*5.0mm
Frequency response:20-16000Hz
Sensitivity: -36dB±2dB
Impedance: 2.2KΩ