The Model 109020 1-Channel Receiver is designed for use in residential garage door operator applications. Typically the receiver mounts directly to the three terminals on the door operator. An 11'' wire antenna extends from the receiver. The operator supplies 24V power to the receiver, or the receiver can be powered by a separate 24V AC power transformer. Remote power accessories available for the Model 109020 include the Model 109201 Wiring Harness and the Model 109207 Wiring Harness. Both models include a plug-in transformer. The receiver's exclusive two-way terminal lugs fit under terminal screws or can be used with push-on terminals in remote placement applications using the Model 109206 3-Wire Adapter. The receiver is programmed with a 10-position coding switch. When a Multi-Code transmitter set to the same code is activated, the receiver's output will activate, triggering the door operator.