(1x) System Sensor B406B Fire Alarm Plug-In Detector Base with Relay NEW IN BOX

System Sensor 5603 Fire Alarm Heat Detector w/ Base USED

System Sensor B406B Fire Alarm Plug-In Detector Base

System Sensor Detector Base B406B with Relay

SYSTEM SENSOR B501BH FIRE ALARM DETECTOR SOUNDER BASE

System Sensor 2W-B i3 Fire Alarm Photoelectric Smoke Detector w/ Base USED

System Sensor 2WTA-B Fire Alarm Photoelectric Smoke & Heat Detector w/ Base USED

System Sensor B210LP Detector Base Low Profile Fire Alarm Mount NEW