Trust 450LR Mouse Wireless Optical. Device interface: RF Wireless, Movement detection technology: Optical. Battery technology: Nickel–Metal Hydride (NiMH). Bundled software: Software included for programming scroll wheel and buttons. Minimum processor: Pentium MMX CPU, Processor clock speed: 166 MHz, Minimum hard disk space: 4 MB. Compatibility: PC, Compatible operating systems: Windows 98, ME, 2000, XP. Microsoft Mouse, Intelli Mouse and Windows 2000 5 button compatible., Mouse dimensions (WxDxH): 40 x 68 x 127 mm