For Windows and Macintosh / Cordless Operation by Radio Frequency / USB Connector on Smart Receiver / Includes Batteries # Cordless makes more sense with Wireless Optical Mouse 5000. With its High-Definition tracking, the Battery power can last up to 6 months. This mouse features an Ergonomic design that fits comfortably in either hand to help you point and click in comfort during extended use. Customizable buttons let you decide how you'd like this mouse to assist you in your Personal tasks. A smart Receiver plugs into your computer's available USB port to provide you with wireless freedom. High Definition Optical technology - Microsoft High Definition Optical mouse products are more precise, more responsive, and deliver smoother tracking # Wireless freedom - Experience the ease and convenience that wireless keyboards and mouse products offer, and say good-bye to tangled cords and clutter # Magnifier - Point and click to enlarge and Edit detail # Tilt Wheel technology - The entire wheel tilts to deliver smooth, accurate performance as you scroll horizontally and vertically through documents and Web pages # Smart Receiver - Work wirelessly without bothersome interference. Smart technology automatically notifies you when interference is present, and then helps you reduce it # Requires available PS/2 or Universal Serial Bus (USB) port # Compatible with PC running Windows XP Professional, Windows XP Home Edition, Windows XP Media Center Edition, Windows XP Tablet PC Edition, or Windows 2000