The 109950 Multi-Code Gate Receiver is normally used in gate operator applications. An 11-inch wire whip antenna is included for local reception. The whip antenna connects to the receiver's Type-F antenna connector. When the receiver is mounted inside a shielded metal enclosure, such as a gate operator housing, an optional external coaxial whip antenna kit should be used. The operator supplies 12–24-volt power to the receiver, or the receiver can be powered by a separate ac power transformer. The receiver is programmed using a 10-position coding switch. When a Multi-Code type transmitter(s) is set to the same code it activates the receiver to trigger the door operator. Includes programming instructions.