Voltage: linear power supply (transformer) dc 9-12 v
Electric current:20MA
Frequency range: 100-5500 KHZ
Audio Monitor Range:5-100sqm(adjustable)
Working Environment::-30 Degrees Celsius ~60 Degrees Celsius
Output impedance: 600 ohm non equilibrium
Connecting mode: terminal
Apply to Hivision, dahua, hanbang and video recorder and other audio device.