Optical tracking - Reduce sticking and constant cleaning with optical trackinga system that works through light with less moving parts for greater durability than ball-based mice. Users benefit from a smooth, contoured shape that fits both handsand a wheel that functions as a third button. The optical sensor within the HP USB Optical Scroll Mouse employs a scan rate of 800dpi and enables crisp motion without a mouse pad, ball or roller. Utilizing the latest optical sensing technology, the HP USB Optical Scroll Mouse records precise motion over a variety of surfaces without a mouse pad. Mouse Recommended usage Universal Buttons type Pressed buttons Scroll type Wheel Movement detection technology Optical Device interface USB Type-A Purpose Office Design HP segment Business Product colour Black Ergonomics Cable length 2.9 m Power Power source Cable Weight & dimensions Weight 120 g Height 37 mm Depth 115 mm Width 63 mm Technical details General Product Safety Regulation (GPSR) URL ht