§ high-fidelity acoustic noise monitor head
§ Built-in DSP noise reduction circuit
§ imported ICs, coupling capacitance
§ net mounted design, the sound is clearer
§ 2mm pinhole into the audio port
§ Japan's imports of silver-plated capacitor microphone
§ including AGC voice incentives of circuit

10 to 150 m2
Impedance of 1000 ohms
Frequency 20 ~ 20Khz
Power 9 ~ 12VDC
Size Φ86 * 27 mm
For Kang, Dahua DVR device