... 1.RF, 2402MHz-2480MHz 2.RF operation channel, 16,automatic frequnency hopping 3.Rated voltage, 1.5V/3.0V 4.Rated current, 12-20mA System ... operation system2.One USB available port.Product feature1.2.4GHz digital wireless transmission,operation distance is up to 10 meters ... designed,comfort grip. 6.Dormant class control and more power-saving hibernation connectionless.7.800dpi-1200dpi-1600dpi e ...