The Microsoft Modern Mobile Mouse-Glacier has two buttons, a right and left click, a Bluetooth® 4.1/2.4 GHz frequency range, Windows 10, 8.1, 8*, Glacier, and Windows 11 Home/Pro must all 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