USB Active Extension Cable

The specification for USB states that the maximum length of a USB cable is 5 meters (16 feet).
As a result, you cannot extend the distance of your USB device more than 16 feet without using a USB active extension cable (also known as a USB repeater cable).
This cable contains active electronics which boost the USB signal for maximum reliability and performance over extended distances.

More: http://www.usbgear.com/USB-Extenders.html