Lenovo USB Laser Mouse (Lenovo Laser Mouse) The Lenovo USB Laser Mouse utilizes optical tracking technology for precision control. Features: 2000 dpi resolution (user selectable to 1600, 800, or 400 dpi) USB attached Tilt wheel for four-way scrolling Fully programmable tilt wheel and buttons to adapt to the way you work Works on many surfaces, no mousepad required Full-size shape that fits comfortably in either hand Software requirements Microsoft Windows XP SP3 (32-bit only) Microsoft Windows Vista SP2 Microsoft Windows 7 Microsoft Windows 8 Packaging Lenovo USB Laser Mouse (Lenovo Laser Mouse) Installation CD Warranty Poster Laser Safety Poster