Specifications:

1) Connector plug: Adapt to Tow-Way Radio’s Model
2) Speaker:
1 power rating：Nominal 40mW,Max 80mW
2 resistance： 32 Ohm±15% at 1KHz 60mV sine wave
3 S.P.L： 107.3dB±3dB at 1KHz 60mW with 142F coupler
3) Microphone:
1 type:Piezoelectric Accelerometer Microphone
2 work voltage 2.5―10V DC
3 impedance 4.7 KΩ
4.Earphone Hull Material:silicon rubber