§ dual interface sensitivity can be adjusted
§ Senior microphone suppress ambient noise
§ a large area into the wider mining tone of the sound port
§ Built-in noise reduction processing circuit
§ power polarity protection circuit
§ Connection to DC female / male + RCA

10 to 100 m2
Impedance 600 ohms
Frequency of 200 ~ 10Khz
Power 9 ~ 14VDC
Size 39 * 31 * 18mm
For HaiKang, Dahua DVR device