The Professional Series CAT5 5500HD extends your dual DVI displays and USB up to 200 feet away from your DVI or HDMI source. The CAT5 5500HD is now available with a built in 4 port USB hub on the receiver unit. The CAT5 5500HD sender unit sits next to your computer. The cables supplied with the CAT5 5500HD connects your DVI source(s) and USB to the sender unit. The CAT5 5500HD receiver unit sits next to your DVI displays - up to 200 feet away. The displays and USB plug into the back of the CAT55000HD receiver unit. Four CAT-5 cables connect the CAT5 5500HD-S and the CAT5 5500HD-R units to each other.