The Microsoft Blue Bluetooth Mouse is compatible with Bluetooth® Low Energy. Mouse button features: 4.0/4.1/4.2/5.0 | 2.4 GHz frequency range Four buttons: wheel, left, right, power (press for more than three seconds to pair), Black, Windows 11/10/8.1 One AA alkaline battery (included and pre-installed), one year, and Bluetooth® 4.0 or higher are requirements for the device.