The HP PS/2 2-Button Optical Scroll Mouse is a two-button mouse with scroll wheel that provides the speed and accuracy of optical tracking in a simple elegant design. It records motion precisely on a variety of surfaces using the latest optical sensing technology. The HP PS/2 2-Button Optical Scroll Mouse has no ball or moving parts which improves its durability makes it require less cleaning and eliminates sticking. The mouse's fortable contoured shape fits either hand.Primary InformationInput Device Type : Mouse Device Form Factor : External Connectivity Technology : Cable Buttons Qty : 2 Movement Resolution : 400 dpi Interfaces : PS/2; 6 pin mini-DIN (PS/2) PC Compatibility : PC Dimensions&MiscellaneousWidth : 2.4 Inch Depth : 4.6 Inch Height : 1.6 Inch System InformationSystem RequirementsSystem Requirements / OS Required : Microsoft Windows Me / 2000 / XP Special FeatureCOO : China UNSPSC CodeUNSPSC Code : 43211708