It is a holder that looks like an arcade cabinet, it allows you to put your game cartage in the back and also a pro controller, with a hole in it to let you charge it while you play it, Where the switch sits the back is open with air holes to help it from overheating, you can also get a Nintendo fan to sit behind it to help it even more. There are two designs, the blue one is the plain one, while the gray one has a Pokeball symbol on it those are the only two differences.