The LINDY USB 2.0 Active Extension Pro Hub extends the cable length of up to 4 USB 2.0 devices by 8m. The Pro Hub can also be used as the final piece in a \'daisy chain\' made up from the LINDY 8m Active Extension Cable Pro and 12m Active Extension Cable Pro to create a USB 2.0 connection spanning up to 52m with 4 USB 2.0 ports at the remote end. It can also be connected directly to a computer to be used as an extended 4 port hub. See below for more details on system installations. Check out ComputerActive\'s 4 Star review of the LINDY USB Active Extension System Pro! Installation To install a USB 2.0 Active Extension System Pro is simple. Start with an 8m Active Extension Cable Pro. Then use up to 4 additional 8m or 12m Active Extension Cables to extend your device further. If you wish to add extra USB ports or to connect a bus powered USB device, use either this 8m or a 12m 4 Port Extension Pro Hub kit as the final segment. The picture below is an example of a typical set-up. Package Contents 8m USB 2.0 Active Extension Pro 4 Port Hub 5V Multi Country PSU LINDY Manual