Pointing Device Pointing Device Connectivity Technology: Cable Movement Detection: Optical Total Number of Buttons: 3 Scroller Type: Scroll Wheel Ergonomic Fit: Symmetrical Interfaces/Ports Pointing Device Host Interface: USB Miscellaneous Operating System Compatibility: Windows 8 Windows XP Windows 7 Windows Vista Mac OS X Device Supported: Computer Environmentally Friendly: Yes Environmental Compliance: Restriction of Hazardous Substances (RoHS) Warranty Limited Warranty: 1 Year Additional Warranty Information: Worldwide parts-and-labor limited warranty; 24x7 HP technical phone support during warranty period