Function defines form. Pro-level back buttons. Pro 2 features two Pro-level back buttons. These buttons give you more control so you don't have to take your thumbs off the thumbsticks. With 8BitDo Ultimate Software you can assign any button function and macros, too. Custom Profile Switching and more Pro 2 gives you more ways to play. The custom profile switch button holds 3 custom profiles that can be switched on the fly. With an enhanced grip, Pro 2 allows you to hold the controller with even less effort. The new 4-way Mode Switch button allows you to instantly switch between Switch, Android, D-input and X-input so you can pair to any device as easily as possible. 8BitDo Ultimate Software now on Pc, Android and iOS Ultimate Software gives you elite control over every piece of your controller - now on Android and iOS.