... motherboard through USB port. 2,Advanced power saving technology, with function of sleep status. 3,Function of low voltage ... of special key combination:[Shift]+[F4]: open the home page of the Internet explorer[Shift]+[F5]: open the Outlook ... batteries (not included)Frequency: 2.4GHz wirelessSystem Requirements: PC with USB portCompatible with: Android PC OS, Mac OS, Linux, Windows systemColor: ...