... through USB port. 2,Advanced power saving technology, with function of sleep status. 3,Function of low voltage indicator. 4,An operating range ... in the room. 8,Explore your new media universe with a state-of-the-art keyboard mouse that's effortless to use in ... volume by waving to the right or left; skip tracks with a flip of the wrist. 12,Automatic frequency-hopping technology, strong anti ...