Dell Premier Multi-Device Wireless Keyboard and Mouse KM5221W White, Keyboard Technology: Plunger, Connectivity Technology: Wireless, Interface: 2.4 GHz, Wireless Receiver: USB, Input Device: Keyboard, Hot Keys Function: 12 programmable keys of F1-F12, Pointing Device: Mouse – wireless – optical, Buttons Qty: 3, Movement Resolution: Adjustable DPI. 1000, 1600(default), 2400, 4000, Included Accessories: AA battery, 2 AAA batteries, Dimensions (WxDxH) / Weight: Keyboard: 43.3 cm x 12.3 cm x 3.4 cm / 400 g, Mouse: 11.532 cm x 3.88 cm / 91.8 g, Color: White, Warranty: 3 years,