Microsoft Wireless optical mouse 3000. Device interface: RF Wireless, Movement detection technology: Optical, Movement resolution: 800 DPI. Cable length: 1.6 m. Battery type: AA. Bundled software: Microsoft Windows 95/98/98SE/Me/2000/XP . Minimum processor: Pentium, AMD, Athlon, Processor clock speed: 266 MHz, Minimum RAM: 32 MB