[General Features] -Wireless freedom 27MHZ digital radio technology 1 channel 256 ID to avoid interference ,1.5 meter operation range 800 DPI precision two rechargeable batterly USB rechargeable(rechargeable current:100MA) [physical characteristics] Size: 85*49.5*28.5mm Buttons : Mouse:5buttins with scrolling wheel ,1 connect button Receiver:1 connect button [Electrical Specification] Interface : USB1.1 USB2.0 Sensor report rate on mouse : 3500 frames/sec Operation angle : 360 degrees Operation distance : < 10 meter Sensor light on mouse : red Receiver power requirement : 5V DC for USB port Frequency : 2.4GHZ (GFSK) ID number : 16bits IDS Resolutions : 800CPI Sensor tracking speed : 21inches/sec Air-protocol rate: 250Kbps Battery : Battery type :two AAA rechargebale batterlies Battery consumption: Operating mode :<=30MA / 3V Sleep mode 1 :<=3MA / 3V Sleep mode 2 :<=500UA / 3V Low battery indicator :1.8V Part 4.0 :Reliability Button switch activation:3,000,000 cycle Scroll wheel encoder activation : 100,000 cycle Operating temperature : -5 -40 degrees celsius Operating humidity :20% - 90%RH [ Reliability ] Button switch activation:3,000,000 cycle Scroll wheel encoder activation : 100,000 cycle Operating temperature : -5 -C40 degrees celsius Operating humidity :20% - 90%RH [System Requirement] Windows98 Windows98se Windows2000 WindowsXP WindowsME Vista