This is the GoPro Contacto Magnetic Door and Power Cable Kit Features: Super-strong magnetic power cable forms a tight weatherproof seal with the door and connects to any USB-C power source1 to charge your camera and extend its runtimes Makes it easy to quickly power up when it would be a challenge to change or charge batteries on the go, and keeps your camera charged at home Can be incorporated into a variety of mounting setups, plus comes with 1.6ft (0.5m) and 3.9ft (1.2m) magnetic power cables and a USB-C Volta adapter cable for more versatility Door is waterproof to 33ft (10m) when installed-the same rating as your original camera door Helps power your camera with or without the battery installed when combined with a Contacto magnetic power cable1 What&';s Included: 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 Compatibility HERO9 Black, HERO10 Black, HERO11 Black, HERO12 Black, HERO13 Black Keep your GoPro charged and max out your recording time-even when you&';re in the middle of the action-with the Contacto Magnetic Door and Power Cable Kit. It lets you skip battery changes while you&';re on the road or trail and stay powered through activities, long sporting events and time-lapse shots. Simply install the door on your camera and connect the power cable to the door, then plug into any USB-C power source1 to juice up. Your battery doesn&';t even have to be installed. The door is also waterproof to 33ft (10m), so you don&';t have to re-install your original door when shooting under water.2 Footnote 1Make sure your USB-C power source is waterproof when using in wet conditions. 2Though the Contacto door is waterproof to 33ft (10m), the complete kit (cables and door) is not intended for underwater use.