Voltage: linear power supply (transformer) dc 9-12 v
Electric current: 20MA
Frequency range: 100-100 KHZ
Audio Monitor Range: 80sqm
Working Environment::-30 Degrees Celsius ~60 Degrees Celsius
Output impedance: 600 ohm non equilibrium
Connecting mode: red (power+) black (public) white (audio+)
Apply to Hikvision, dahua, hanbang and other video recorder Surveillance kits