LiftMaster Photoelectric Smoke Detector (4 Wires) | LIF-LMPD24-4W 790022 Introducing the Guardian Angel White/White

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LiftMaster Photoelectric Smoke Detector (4 Wires) | LIF-LMPD24-4W 790022 Introducing the Guardian Angel White/WhiteLiftMaster Photoelectric Smoke Detector (4 Wires) LIF LMPD24 4W The LMPD24 incorporates a state of the art optical sensing chamber and an advanced microprocessor. The microprocessor allows the detector to automatically adjust its sensitivity back to the factory setting when it becomes more sensitive due to contaminants settling in its chamber.