The new 4-way Mode Switch button allows you to instantly switch between Switch(S), Mac OS(A), D-input(D) and X-input(X) so you can pair to any device as easily as possible. 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. Ultimate Software gives you elite control over every piece of your controller - now on Android and iOS. Customize button mapping, adjust stick & trigger sensitivity, vibration control and create macros with any button combination. Create controller profiles and switch between them at any time with the custom profile switch. Pro 2 has excellent performance in racing, fighting and role-playing games with its built-in 128-level intelligent vibration algorithm self-adaptive to the gaming scene.Pro 2 has 6 axis motion sensor for excellent grip and precise positioning & shooting in FPS games. Pro 2 is designed of dual-mode battery compartment, with a built-in 1000Ah rechargeable battery pack lasting for 20 hours, also compatible with 2 AA batteries.