Size compared to Xbox Wireless Adapter for Windows. Controller and headset sold separately. For use with the Xbox One Wireless Controller or Xbox Wireless Controller and controller compatible games on PCs and Tablets running Windows 10 with USB 2.0 or USB 3.0. Not compatible with controllers designed for Xbox 360. Significant firmware update may be required; ISP fees apply. Please visit xbox.com/xboxone/controllerupdate for update instructions.