USB to AV Output Line Conversion Adapter Cable for Gopro3 Camera W/Power Input External 5V Power Supply T Version Gopro/Gopro 3 USB Video output cable,one side is USB connector the other side 1 is servo male connector for AV video output Red:Audio out / White:video out /Black:GND the other side 2 is servo female connector for 5V DC power supply input(you can use the 3A UBEC for it) Red:Positive / Black:Negative pole / White:without fuction