The Marmitek Invisible Control allows you to operate devices while they're behind closed doors in a cabinet. This way, dust doesn't stand a chance, and your devices are safe from pets or small children, for instance. Simply put the small IR module in a place where your remote has reach, and position the extension cord sensor on the receiver of the devices you'd like to operate. The receiver works on a 9V battery or on mains power. With the Marmitek Invisible Control, you can control 6 devices that are out of sight.