This 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 cable's length to 16 feet (4.9 meters). 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 131 feet (40 meters) by daisy-chaining four of these active cables. The cable must be plugged directly into a USB port (either on the PC or a hub). Use a standard six-foot (1.8-meter), 10-foot (3.1-meter) or 15-foot (4.6-meter) USB A/B cable to reach the desired distance. The U026-10M provides up to 150mA of power to the connected device. If your device requires more than 150mA of power, it will either need to have its own power supply or to be plugged into a powered USB 2.0 hub (such as U222-004-R) that is connected to the U026-10M.