The Microsoft Modern Mobile Mouse in Pastel Blue has two buttons, a right and left click, a Bluetooth® 4.1/2.4 GHz frequency range, Pastel Blue, Windows 10 8.1 / 8*, Windows 11 Home/Pro, and the host must have Bluetooth® 4.0 or higher installed. (Note: Bluetooth 4.0 is not supported by many Apple and Windows 7 devices). powered by two AAA batteries, one year