Connection interface:  Bluetooth® Low Energy 5.0 Wireless frequency:  2.4 GHz frequency range Wireless range:  33 feet (10 meters) in open area; up to 17 feet (5 meters) in typical office environment Compatibility1:  Microsoft Windows 11/10/8.1 Device must support Bluetooth® 4.0 or higher Dimensions:  81.8 x 110.8 X 9.1 mm (3.22 x 4.36 x .36 in) Weight:  2.75 oz (78 g) (including batteries) Battery:  1 CR2032 Lithium coin battery (included and pre-installed) Battery life:  Up to 24 months2 Colours3:  Glacier, Matte Black Warranty4:  1-year limited warranty Technology details:  Bluetooth LE 5.0, Scissor keyset, 1.35 mm low profile key travel