The blue 4-Port USB 2.0 Manual Switch from Cables To Go allows you to share a USB device among four PCs. You can quickly and easily extend the number of USB devices shared by using a USB hub to daisy-chain up to 127 devices. The hot key functionality enables use of a keyboard to switch among computers, while the LED port status indicator shows which computer is selected. Furthermore, plug-and-play functionality makes installation a breeze.