... Technical SPEC.1.RF, 2402MHz-2480MHz 2.RF operation channel, 16,automatic frequnency hopping 3.Rated voltage, 1.5V/3.0V 4 ... .One USB available port.Product feature1.2.4GHz digital wireless transmission,operation distance is up to 10 meters.2.built-in mouse memory,no ... Power-saving technology,the service life of one alkaline battery is up to six months 4.Intelligent connectivity,no need to ...