Lenovo Go RF Wireless Office Optical Mouse in Grey 2,400 DPI Product colour___Blue. Silver so minor spillages on the so minor spillages on the keys can be easily drained she's not just the smaller sibling she's a force to be reckoned with Windows 7 Weight & dimensions Weight 97 g Height 62 mm Depth 63 mm Width 104 mm Packaging content Warranty card Yes Batteries included Yes Wireless receiver interface USB Type A Receiver included Yes Packaging data Package height 145 mm Package weight 315 g Package depth 87 mm Package width 113 mm Quantity per pack 1 pc(s) Logistics data Harmonized System (HS) code 84716070 Our hands were not designed to be flat on tables for 8 hours a day