§ hi-fi soundtrack voice monitor head
§ Built-in AGC gain audio circuit
§ imported ICs, coupling capacitance
§ metal,vandal proof
§ 2mm pinhole design
§ Japan's imports of gold-plated capacitor microphone
§ Dynamic closed-loop noise reduction circuit
10 to 150 m2
Impedance 600 ohms
Frequency 20 ~ 20Khz
Power 9 ~ 12VDC
Size Φ67 * 35mm
For HaiKang, Dahua DVR device | 
Product Description 
