Unitek's active hub has 4 USB ports (Type A). With the hub, you can connect four peripheral devices to the computer at the same time, such as an external drive, scanner or webcam. More USB ports mean more convenient use of the computer. The active Unitek USB hub is equipped with Plug and play technology, so you don't need to install drivers. You plug it into a USB port on your computer and you're ready to go. The cable terminated with A-type plug is 150 cm long.