Tripp Lites 20-meter (66ft ) USB 2.0 active extension cable is a bus powered extension cable that can be used to increase the length of a device cable without the worry of signal loss and potential performance problems. USB limits a cables length to 16ft. Any length above 16 feet requires the use of an active cable such as this one. This cable has a signal booster built in. The overall cable length can be extended up to 131ft by daisy chaining up to 2 of these active cables. The cable must be plugged directly into a USB port (either on the PC or a hub). Use a standard 6 10 or 15 USB A-B cable to reach the desired distance. Tripp Lite warrants this product to be free from defects in materials and workmanship for life. Also known as -U026-20M Signal Repeater-Tripp Lite U026-20M Signal Repeater-TRIPP LITE U026-20M USB 2.0 Hi-Speed Active Extension/Repeater Cable (20m)-Tripp Lite USB 2.0 Hi-Speed Active Extension Repeater Cable (A M/F) 20 Meter (65-Tripp-Lite U026-20M Cable 20-Meter-65 ft. USB2.0 A-A Hi-Speed Active Extension-R