... caused by spread of the virus 2 Port USB Sharing SwitchUSB2.0 automatic printing sharing device,USB2. ... 0 peripheral sharing device,two oe four hosts share a usb equipment,such as printer,scaner,moblie HDD, ... so on,each host be contected with the usb equipment directly,not be limited by network,no ... , outer net and many people are sharing one USB equipment's purpose.switching by hot key or buttons ...