2.4GHz range Up to 10 meters Operating system compatibility Microsoft Windows 10 Microsoft Number Pad Glacier Standalone Number Pad for Numeric Input Microsoft Windows 8.1 *Device must support Bluetooth 4.0 or higher Product dimensions 81.8 x 110.8 x 9.1 mm Product weight 78 g (including batteries) Additional features Power On/Off Switch Multi-host support: Connect up to 3 devices Advanced features: Swift Pair for easy connect Customizable keys