Recommended for those who want to enjoy Smash Bros. and other versus games more comfortably. Operation has been confirmed. [Product Name] Nintendo Switch GameCube Controller Adapter Switch GC Controller Adapter 3-in-1 TURBO Rapid-Fire 4 Ports Up to 8 Players Simultaneously Compatible with Super Smash Bros. For Switch (also works with Wii U) ◆Product Features ✅【Wide Compatibility】 Can be used with Nintendo Switch (OLED model compatible), Wii U, and PC. You can use your favorite GC (GameCube) controllers on the latest models, making versus games like Smash Bros. and Bomberman even more exciting. ✅【TURBO Rapid-Fire & HOME Function】 Just press the TURBO button to activate rapid-fire mode! Gives you an advantage in action and shooting games. Also, black cable = for power, gray cable = for vibration, easy switching. You can use only the black cable if you don't need vibration. ✅【Easy Connection & Plug and Play】 Simple design, just plug it into the Switch dock. Play immediately without any settings. Simple operation: turn on rapid-fire with the Turbo button, and turn it off by pressing it again. ✅【Stable High-Speed Communication】 Equipped with an improved chip for stable data transfer without delay. Enjoy immersive gameplay. ✅【4 Ports & Supports Up to 8 Players】 4 players with one adapter, and up to 8 players simultaneously with two adapters! Perfect for friends, family, and party games. You're sure to have a blast playing Smash Bros.! We will ship within 24 hours after purchase confirmation. Please feel free to ask if you have any questions (*^▽^*)