Verbatim Notebook Laser Mouse, 96673 Laser - Precision movement and control with laser sensor tracking. Retractable Cable - USB cable retracts quickly to store inside the mouse. Tilt Wheel - Scroll up, down, left or right with Tilt Wheel navigation. 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, Vista Mac OS 10.4.X and higher