USB port. For charging only, it doesn't transfer data, so I can't use the controller charger all the time due to the presence of an external hard drive. And play with mouse and keyboard. You just don't have enough USB slots. To go back to your controllers for another game, etc. Everything else is fine. I would definitely pay attention to your USB requirements when making a purchase. If you don't use mouse keyboard controllers and an external hard drive, this is the perfect complement. Looks neat, cools PS5. And it helps to create order.