The present invention describes a system and method of managing digital content received from content providers and for facilitating access to the digital content to many subscribers. The female thread is symmetrically disposed on both ends of a coupling. The devices can be manufactured in essentially any shape or size and can be incorporated into a variety of articles of sports equipment, such as sport shoes, elbow braces, gloves, etc. The output current detector is operative to detect an output current level having a magnitude greater than a predetermined threshold and provide a control signal. The invention provides for overwriting and content-preserving instructions, and for overlapping and separate locations. An electric wire for supplying an electric power is held on an elongated, flexible holding sheet having an engaging part, which attaches the electric wire to the holding sheet.