Wireless Optical Mouse; size:97*55*36 mm ; AAA Battery Resolution: 800 to 1,600DPI Solution: A7050 Consumption power: less than 100mA Rating work voltage: 4.75 to 5.25V Operating temperature: -10 to 45 degrees Celsius Length of the line: 150cm Connection type: PS/2 USB U+P Key life: greater than than 100 million times Compatible operation system: Windows 98, 2000, ME, NT, XP, Vista