Kensington Lock
The Kensington lock is a device used to physically fix the system when using dit in a public place.
(The locking device has to be purchased separately.)
For using a locking device, contact where you purchase it.
USB connection terminal
UP (USB upstream port): Connect the 
UP port of the monitor and the USB port of the computer with the USB cable.
DOWN (USB downstream port): Connect the 
DOWN port of
the USB monitor and a USB device with the USB cable.
To use
DOWN (Downstream Port), you have to connect the 
UP (Upstream Cable ) to the PC.
Make sure to use the USB cable supplied with this monitor to connect the monitor's 
UP port and your computer's USB port.
See Connecting the Monitor for further information regarding cable connections.