Connection interface Bluetooth Low Energy 5.0 Wireless frequency 2.4 GHz frequency range Wireless range 10 meters in open area; up to 5 meters in typical office environment Compatibility Microsoft Windows 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 78 g including batteries Battery CR2032 Lithium coin battery included and pre installed Battery life Up to 24 months Colours Matte Black, Glacier Warranty 1 year limited warranty Technology details Bluetooth LE 5.0 Scissor keyset 1.35mm low profile key travel Product feature performance Multi host support: Connect, up to 3 devices .Power On/Off Switch Advanced features: Swift Pair6 for easy connect.Customizable keys. Sold separately. 1 Smart Switching not available on devices running Windows 10 S. 2 Customization requires download of the Mouse and Keyboard Centre and is not available on devices running Windows 10 S or Mac OSX. 3 Battery life may vary based on user and computing conditions. 4 Available colours may vary by market. 5 Requires Mouse and Keyboard Centre software installation. PC must meet these requirements to download: Microsoft Windows 10/8.1, 150MB available hard disk space. You must accept License Terms for software download at microsoft/accessories/downloads. Internet is required, and associated charges may apply. Not available on devices running Windows 10 S or Mac OSX. 6 Pairing functionality requires Windows 10 with the latest updates. 7 Microsoft's Limited Warranty is in addition to your consumer law rights.