First Alert RM4 Smart Relay
$71.25
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Activates auxiliary devices when alarm device sounds Works with compatible BRK and First Alert smoke, heat, and carbon monoxide detectors 120V AC powered Enhances the effectiveness of your detector alarm Great for adding a strobe light, siren, bell, door closer, or similar device Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
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