Lenovo 520 RF Wireless Optical Mouse in Black Platinum 1,000 DPI Display resolution___2256 x 1504 pixels An advanced digital processor fine tunes An advanced digital processor fine tunes your audio for an accurate and emotive listening experience SD card reader 4 GHz wireless technology via nano USB receiver 1 Weight & dimensions Weight 70 g Height 35 mm Depth 105 mm Width 62 mm Packaging content User guide Yes Batteries included Yes Receiver type Nano receiver Wireless receiver interface USB Type A Receiver included Yes Packaging data Package type Box Package height 197 mm Package depth 55 mm Package width 120 mm Quantity per pack 1 pc(s)