Mayflash GameCube Controller Adapter for Wii & Wii U (Dual Pack), White
Brand: May Flash
Connect two GameCube controllers to a Wii or Wii U system.
Built in Turbo.
Switch the LEFT STICK and POV Directional Button by pressing the button START and B for 3 seconds, and switch back by pressing the button START and A for 3 seconds.
Supports ZL button.
Compatible with all games supported by the Wii Classic Controller, Wii Classic Controller Pro.
The button A, B, X, Y, L, R and Z can be customized with TURBO.

How to connect?
Connect the Wii Remote Controller (Wii Remote is not included in the packaging) to your Wii or Wii U console, then plug your GC Controller to the adapter,and finally connect the adapter to your Wii Remote Controller.
Connect two GameCube controllers to a Wii or Wii U system.
Built in Turbo.
Compatible with all games supported by the Wii Classic Controller, Wii Classic Controller Pro.
The button A, B, X, Y, L, R and Z can be customized with TURBO.