§ the high sensitivity of high-fidelity acoustic
§ Built-in AGC gain audio circuit
§ Import amplifier ICs, coupling capacitance
§ 2mm pinhole design
§ Japan's imports of gold-plated capacitor microphone
§ Dynamic closed-loop noise reduction circuit

10 to 200 m2
Impedance 600 ohms
Frequency 20 ~ 20Khz
Power 9 ~ 12VDC
Size 75 * 75 * 23mm
For HaiKang, Dahua DVR device