The Multi-Code 302101 2-Channel Heavy-Duty Gate Receiver is designed for use in gate operator applications. The receiver is housed in a heavy-duty metal cabinet. The cabinet meets NEMA 13 and JIC specifications and features a sealed strain relief bushing for wiring. 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. Your operator supplies 24vac or 24vdc power to the receiver. 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.