This is a wireless microphone peripheral that uses the included receiver. The receiver is connected to the USB port of a compatible device. Compatible with Nintendo Switch and Switch 2. [Set Contents] * Nintendo USB Wireless Microphone: 1 * Nintendo USB Wireless Microphone Receiver: 1 Requires 2 AA alkaline batteries. I bought this with the intention of using it, but I never did, so I threw away the box. I am selling it at a significantly lower price than the retail price on Rakuten, so it's a great deal! It will be shipped with bubble wrap packaging!