The USB receiver is conveniently located in the box, top flap. Compatibility- Windows, Chrome OS Work for longer with long battery life: Basic AA and AAA batteries are included with the keyboard and mouse Keyboard and mouse combo: The Logitech MK270 Wireless keyboard and mouse combo includes a full size keyboard and a precision mouse so you can work comfortably away from your computer Easy storage: The MK270 includes a plug and forget receiver that cleverly stores inside your mouse for safekeeping. Programmable hotkeys to boost productivity: Automatically access frequently used applications by programming them to the 8 available hotkeys