Lenovo Go RF Wireless Office Optical Mouse in Grey 2,400 DPI Product colour___Blue. Silver Pure ANC off for low power mode Pure ANC off for low power mode provides up to 40 hours of battery life so minor spillages on the keys can be easily drained 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 Mouse Certification CB