§ fidelity low noise processing chip
§ Senior microphone suppress ambient noise
§ hemisphere shell sensitivity can be adjusted
§ meeting room, hall, commonly used
§ Built-in noise reduction processing circuit
§ power polarity protection circuit

10 to 100 m2
Impedance 600 ohms
Frequency of 200 ~ 10Khz
Power 9 ~ 14VDC
Size Φ72 * 41mm
For HaiKang, Dahua DVR device