*with USB connector

*insert the USB connector into the USB port of the computer

*insert all the other devices.lide display ,printer,scanner.audio,light etc,into the 5 sockets

*only when there is output for the computer,there will be output for all the other devices.

*so when you closed the computer ,all the other devices will be closed automatically.

*(NOTE)some computers still have 5V power after being closed,  in this case, the other devices will not be closed automatically.