Wireless Optical Mouse / Ergonomic Design / Can be used in either the right or left hand / 3 Buttons / Scrollwheel / PC & Mac / USB # The Wireless Optical Mouse 2000 combines the accuracy of an optical mouse, with the freedom of movement that you can only achieve with wireless technology. Ergonomic & Ambidextrous Design - fits comfortably in either your right or left hand # Certified for Windows Vista # 3 Buttons # Scroll Wheel # PC & Mac Compatible # PC Operating system Requirements: Windows Vista, Windows 98/2000/XP/Pro/Home/Media Center Edition/Tablet PC Edition # Mac Operating System Requirements: Mac OS X v.10.1-10.4.X (excluding Mac OS X v. 10.0) # Requires a USB port for wireless transmitter