LiftMaster K15-50B18QGX Output Sprocket emergency-device It functions as a Type If your SL920 operator GL1-FL push-bar Select Model:Pump Motor Assembly with Enclosure - 115V

It functions as a Type B1 non-contact sensor

The DoorKing 2600-588 Heater Kit is a genuine OEM accessory designed to provide temperature regulation for the 1812 model telephone intercom system in cold-weather environments

sold separately

this transmitter allows individual channel control with each button or combined activation by pressing both buttons simultaneously

and the system is available with both post mount and pad mount options

LiftMaster K15 50B18QGX Output Sprocket emergency device It functions as a Type If your SL920 operator GL1 FL push bar Select Model:Pump Motor Assembly with Enclosure 115V It functions as a Type B1 non contact sensor The DoorKing 2600 588 Heater Kit is a genuine OEM accessory designed to provide temperature regulation for the 1812 model telephone intercom system in cold weather environments