Voltage: linear power supply (transformer) dc 9-12 v
Electric current:18MA
Working Environment::-30 Degrees Celsius ~60 Degrees Celsius
Audio Monitor Range:5-50sqm
Output impedance: 600 ohm non equilibrium
Connecting mode: red (DC) white (RCA) black (DC)
Apply to Hikvision, dahua, hanbang and other DVR