... , Charging for camer 3) DC12V output 4) Video, audio and power supply 5) OEM 1) Portable tester with3.5 inch TFT display(video input ... , highly integrated and practical5) Audio test function, built-in 0.5 speaker, support for audio input / output6) Support DC12V output, charging ... ) Maximum charge voltage: 4.25V Model BT-B800 LCD screen 3.5 inch TFT LCD Input voltage 5V, 2A (±10%) Video signal formats ...