The GameCube Controller Adapter allows you to connect up to four GameCube controllers (or GameCube Wireless Controllers) to your Wii U system and PC USB.
With two GameCube Controller Adapters, up to eight GameCube controllers can be used simultaneously
Switch to "Wii U" or "PC" mode using the switch located on the side
The GameCube Controller Adapter is only compatible with Super Smash Bros. for Wii U, but supports the GC/Wii Emulator Dolphin on PC.
Supports built-in vibration feedback without lag by connecting the adapter's two USB ports to your Wii U system or to your computer's USB connector ports.
The driver is required if you need vibration feedback in PC mode. 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 in PC mode