This Electronic Master USB cable extend your USB connection from your device. This cable features a standard USB A Male connector on one end and an A Female connector on the other and is particularly useful for extending the reach of a USB cable with a proprietary connector or fixed device on one end. The cable uses high level conductors for the data and power transfer. The retractable design makes this cable ideal for stowing in a purse or a bag. Simply pull both ends of the cable and slowly release and the cable will store neatly in it's housing without getting tangled.