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 Compatibility3:  Microsoft Windows 11 Home/Pro / 10 / 8.1 Device must support Bluetooth® 4.0 or higher** Dimensions:  11.18 x 4.36 x .35 in (284.07 x 110.77 x 9.05 mm) Weight:  288 g, 10.16 oz (including batteries) Battery:  4 CR2032 Lithium coin batteries (included and pre-installed) Battery life:  Up to 36 months2 Colors4:  Glacier Warranty5:  1-year limited warranty Technology details:  Bluetooth LE 5.0 ,Dedicated Expressive Input (emoji) and Screen snipping keys Scissor keyset, 1.35 mm low profile key travel Product feature performance:  Multi-host support: Connect up to 3 devices Power On/Off Switch:  Advanced features: Swift Pair1 for easy connect