1) Portable cctv tester monitor 2) Power-saving, Charging for camer ... practical5) Audio test function, built-in 0.5 speaker, support for audio input / output6) Support DC12V output ... 7V/2200mAh, Automatic charging function8) Power supply: Battery-powered, computer USB port power supply, DC5V/2Aadapter power ... identity Video output mode 1.0Vp-p Louder speaker 8Ω/1w Power output DC12V/350mA Recharge mode ...