This is a replacement for a standard switch that is often used in campervans like the hyper Grand Canyon s. It gives you the possibility to add a usb charger (example below) to your camper van. In addition you can add a xt60 socket to connect anything to your 12V power-system (take care of the max amps).
Example for the USB-Charger:
The author marked this model as their own original creation.