First Alert BRK SC9120B 85-Decibel Ionization Hardwired Smoke and Electrochemical Carbon Monoxide Detector with Battery Backup

This smoke and carbon monoxide alarm features dual ionization and electrochemical sensors. It includes an 85dB alarm with a silence option and Intelligent Sensing Technology to minimize false alarms. The Latching Alarm Indication identifies and remembers the initiating unit, which flashes its red LED during and after an alarm event.

The Perfect Mount system offers a secure, adjustable installation with a gasketless base and mounting bracket. Additional features include a dust cover, keyhole slots for easy installation, and two locking mechanisms to prevent theft. The Quick-Connect wiring harness simplifies AC power connection.

The alarm detects fine particles from fast-burning fires and uses indicator lights to show the presence of smoke or carbon monoxide. It includes a test/silence button, side-load battery compartment, and tamper-resistant locking brackets. Rigorously tested to meet UL standards.