System Sensor 4W-B Smoke Detector 4-Wire -

System Sensor i3 Series 4W-B 4-Wire Plug-In Photoelectric Smoke Detector w/ Base

System Sensor 4W-B 4-Wire Photoelectric Smoke Detector with Mounting Base

SYSTEM SENSOR 4W-B I3 SERIES 4-WIRE PHOTOELECTRIC SMOKE DETECTOR W/PLUG-IN BASE

System Sensor 4W-B Smoke Alarm,12/24 Vdc, 4-Wire,W/Base

System Sensor 4W-B Smoke Detector 4-Wire - Same Day Shipping (SEALED)

System Sesor 4W-B Smoke Detector (Tested)