Keep your GoPro charged and extend its runtimeeven when youre in the middle of the actionwith the waterproof Contacto door. Skip battery changes on the go and stay juiced during long events or time-lapse shots. Simply attach the door to your camera, then use the magnetic cable to connect to any USB-C power source. Includes Contacto Door, Contacto USB-C Cable 1.6ft (0.5m), Contacto USB-C Cable 3.9ft (1.2m), Adapter Cable for Volta and USB-C