Universal Security Instruments USI-960 Electric Relay Module for Smoke and Fire Alarms
![Smoke and Heat Detector FT-143 Relay output 4-wire With base smoke heat compound fire detection system [FT-143] - $11.00 : China top brand burglar and fire alarm systems, New technology burglar and](https://vedardalarm.com/images/alarm_sensor/YT-142.jpg "Smoke and Heat Detector FT-143 Relay output 4-wire With base smoke heat compound fire detection system [FT-143] - $11.00 : China top brand burglar and fire alarm systems, New technology burglar and")
Smoke and Heat Detector FT-143 Relay output 4-wire With base smoke heat compound fire detection system [FT-143] - $11.00 : China top brand burglar and fire alarm systems, New technology burglar and
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