Microsoft Bluetooth Desktop Bluetooth Mouse & Keyboard Black Microsoft Bluetooth® Mouse Connection interface: Bluetooth® Low Energy compatible 4.0/4.1/4.2/5.0 Wireless frequency: 2.4 GHz frequency range Wireless range: 33 feet (10 metres) in an open area; up to 16 feet (5 metres) in a typical office environment Compatibility4: Microsoft Windows 10/8.1 Device must support Bluetooth® 4.0 or higher Dimensions : 3.95 × 2.29 × 1.50 in (100.4 × 58.2 × 38.3 mm) Weight: 3.095 oz (78 g) (including batteries) Battery: 1 AA alkaline battery (included and pre-installed) Battery life:Up to 12 months1 Colours: Matte Black Warranty: 1-year limited warranty Technology details Mouse tracking system: Red tracking Imaging rate: Dynamically adaptable to 4,000 frames per second X-Y resolution: 1000 points per inch (39.4 points per millimetre) Tracking speed: Up to 30 inches (762 millimetres) per second Microsoft Bluetooth® Keyboard Connection interface : Bluetooth® Low Energy compatible 4.x/5.0 Wireless frequency: 2.4 GHz frequency range Wireless range :33 feet (10 metres) in an open area; up to 16 feet (5 metres) in a typical office environment Compatibility2 :Microsoft Windows 10/8.1 Device must support Bluetooth® 4.0 or higher IOS/MacOS and Android devices are compatible with limited features Dimensions:17.12 × 4.87 × 0.749 in (434.9 × 123.7 × 19 mm) Weight:16.32 oz (461.6 g) (including batteries) Battery:2 AAA alkaline battery (included) Battery life:Up to 3 years1 Colours:Matte Black Warranty:1-year limited warranty Technology details:Dedicated Office* and Expressive Input (emoji) keys Product feature performance: Advanced features: Swift Pair for easy mouse-to-computer pairing3 Customisable features:2 Favourite key reassignment; Media, Previous Track, Play/Pause, Next Track and Emoji key