Enhance productivity with faster, more accurate tracking. Compact, contoured design fits easily in laptop bags and keeps you more comfortable while you work. BlueTrack technology enables effective tracking on nearly any surface, even carpet. Four-way scroll wheel allows you to navigate horizontally or vertically. Made for Windows by the people who created Windows. Connector/Port/Interface: Bluetooth Left/Right Hand Use: Left/Right Mouse Technology: Optical Wired/Wireless: Wireless.