. PN: 920-006489 Dimensions Keyboard Height 186.7 mm Width 447.2 mm Depth 21.4 mm Weight 603 g Mouse Height 105.4 mm Width 67.9 mm Depth 38.4 mm Weight 86.4 g Nano receiver Height 18.7 mm Width 23.1 mm Depth 6.6 mm Weight 2.0 g Technical Specifications Keyboard Spill-resistant design Adjustable height -tilt legs Special Keys Music Controls Palm Rest 10-Key Number pad Key type Deep profile On/Off power switch 2 AAA batteries（Alkaline Battery) Battery 36 months  Mouse Sensor Technology High-precision Optical tracking Number of Buttons 3 (Left/Right-click, Middle click) Scrolling line-by-line Scroll Wheel Yes, 2D , mechanical Connect/Power On/Off power button 1 AA battery（Alkaline Battery） Battery 18 months  Wireless range (in meters) 10 m