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The coupler assembly connects the garage door opener motor to the screw drive rail assembly
Siren Test: The SOS includes a CD recording of an emergency responder "yelp" siren so you can test the unit and adjust the sensitivity settings to your preference
2A Power Supply
0 garage door opener
LiftMaster K77-36389 Hardware Kit, LA500 The coupler assembly connects theDescription This is a LA500 Hardware Replacement Kit. For use with LiftMaster LA500 Series Commercial Swing Gate Operators. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. Genuine LiftMaster replacement part.
