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Fit for HYT PD502 PD505 PD506 PD508 PD562 PD565 PD566 PD568 PD402 PD405 PD406 PD408 PD412 PD415 PD416 PD418.

Specifications of EHM04-A

Weight	about 28g
Color	black
PTT Key	available
VOX	none
Emergency Key	none
Connector	2-pin
Microphone Sensitivity	-42±3dB@1kHz 3.0V 2.2KΩ;0dB=1V/Pa
Speaker Power	20 mW (rated); 30 mW (max.)
Speaker Impedance	32Ω±15%@1kHz
Speaker Frequency Response	102±4dB@1kHz at10mW
IP Rating	none
Operating Temperature	-20~60℃
Storage Temperature	-40~85℃

Package list:

1 x earphone