HJ HJ03 5.8G Transmitter FPV A/V Real-time Output Cable For Gopro Hero 3 Hero 3+ Material: durable hard plastic and copper wire. USB 90-Degree Connector to FPV AV Video Output Cable. USB connector is used to connect to the USB port on your GoPro Hero3 Camera, and the 3-pin female connector is for AV video output. 90-degree USB connector design, for convenient you to fit the cable more securely to the camera without extruding plug. This cable works with all video transmitters, such as Fatshark. Yellow pin goes to video signal pin on the VTX and black pin goes to Ground on the VTX. Very easy to setup.