The Doorlec DC3200T multi-channel transmitter is a hand held wireless remote three push button station. The case is made from polycarbonate plastic material for industrial use. lts convenient size and design make it easy to carry and operate. The unit can be mounted on a dash, on an instrument panel, or stored in the glove compartment of your vehicle. The transmitter is powered by an ordinary 9 volt transistor battery. A LED indicator on the front of the transmitter indicates if battery power is in good condition. The light illuminates when transmitting and confirms successful operation. Note: Up to 32 doors or gates.