This is a set of a wireless microphone and a USB receiver compatible with the Wii U. - Type: Wireless Microphone - Receiver: USB Microphone Receiver - Compatible Models: Wii U Thank you for viewing. This is a used item, but it is in good condition! I am selling it because the karaoke service on the Wii U has ended. I have researched and found that it can also be used on the Switch. I do not own a Switch, so I have not confirmed this.