The GameCube Controller Adapter allows you to connect up to two GameCube controllers (or wireless GameCube controllers) to a Wii U system and PC USB. Switch to ?Wii U? or ?PC? mode by using the switch located on the side. Supports the GC/Wii Emulator Dolphin. Supports the built-in Vibration Feedback with no delays. The driver is required if you need the vibration feedback on the Windows.Please download it from www.mayflash.com/Support/Download. Compatible with Windows XP, Vista, Windows 7,Windows 8,32 bit and 64 bit and Mac OS under the PC mode.