Verbatim Wireless Notebook Laser Mouse 96672 Wireless - Plug in receiver and go wireless. 2.4 Ghz reliability and performance. Slim Receiver - Designed to fit securely under the mouse. Comfort Grip - Smooth, textured grip. Designed for comfort and control. Speed Control - Change speed with one touch. 3 settings with up to 1600 dpi sensitivity. System Requirements: USB 2.0 (Also compatible with USB 1.1 ports)Windows XP, 2000, VistaMac OS 10.4.X and higher