1. 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. 2. Switch mode by using the switch located on the side. 3. Supports the gc/Wii emulator dolphin. 4. Supports the built-in vibration feedback with no delays. 5.compatible with windows xp, vista, windows 7,windows 8,32 bit and 64 bit and mac os under the pc mode.