Operational Frequency:2.4GHz Buttons Life:3000000 times The maixmum effective distance:10 meter Support:windows95/98/2000/ME.NT/XP/VISTA/7 Resolution:800/1600dpi Wireless carriers Frequency:2402MHz-2480MHz Wireless working channels: 16 , automatic frequency jumping Rated operational voltage:1.5V Rated operational current:15mA Power supply:2*AAA Battery USB Port:2.0 Color:Black Size:95mmX65mmX38mm Package:No package