Pro Controller U - Now that I've learned that it can't actually be used as a Wii U Pro Controller. And the package seems to make it quite clear that it can.
Wii U pro controller vector by lDaisuke on DeviantArt
Wii U Pro Controller - Wikipedia
Nintendo Wii U Pro Controller (Black) - Ovládač | alza.sk
WiiU - Pro Controller Black | Nay.sk
Amazon.com: Poulep Wireless Controller for Wii U Pro Console (White) : Video Games
Wireless Classic Pro Controller Remote Gamepad + Cable for Nintendo Wi – Althemax
Pro Controller For Wii U, Powerlead Wireless Controller Gamepad For Wii U Dual Analog Game Remote Joystick (white) | Fruugo SK
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Nintendo Wii U Controller Pro 3D model - Download Electronics on 3DModels.org
Wireless Classic Pro Controller Joystick Gamepad for Nintend wii U Pro with USB Cable Wireless Controller - AliExpress