"Upgraded Version" Tukebon Switch GC Controller Adapter, GC Controller Connection Tap, Nintendo GameCube Controller Connection Tap, 4 Ports, Play with up to 8 Players Simultaneously, Compatible with Super Smash Bros., for Switch OLED/Switch/Wii U/PC This is a peripheral connection tap for Nintendo Switch, Switch OLED Model, PC, and Wii U. With this, you can use your familiar GC controller on Wii U/Nintendo Switch, and enjoy the latest games with the same feel as before. Especially suitable for Super Smash Bros. Enjoy exciting competitive games like Smash Bros. and Bomberman! Up to 4 GC controllers can be connected to one GameCube controller connection tap. By using two connection taps, you can enjoy playing with up to 8 people. Let's enjoy competitive games with everyone! This GC controller connection tap uses the latest code analysis chip and high-quality copper core, providing faster and more stable signal transmission. No delay, with a sense of realism, expressing the sense of space as much as possible, bringing a better gaming experience. Plug and play on Switch & Wii U. Also, if you want to enjoy it on "Switch & Wii U", set the "Switch & Wii U/PC switch" on the connection tap to "Switch & Wii U". I opened it after purchase, but I haven't had a chance to use the GC controller, so I'm putting it up for sale. I purchased it on Amazon.