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Feature

Keep your family safe with this 3-pack of hardwired smoke and carbon monoxide alarm; the battery backup means constant monitoring, even if there's a power failure
Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire
Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection
Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected
Simple to use, with a single test/silence button, and side-load battery compartment; tamper-resistant locking brackets and universal mounting brackets make installation easy
Rigorously tested to meet UL standards

Description

This 3-pack of First Alert SC9120B Hardwired Smoke and Carbon Monoxide Detectors includes 9-volt battery backups that continue to protect you in the event of a power failure. The detectors feature electrochemical CO sensing technology, ionization sensors for smoke detection, and 85-decibel alarms. One button silences any nuisance alarms, and also tests detector functions, while lights indicate if the alarm detects smoke or carbon monoxide. The latching alarm indicator automatically identifies which unit initiated the alarm, even after the conditions that set off the alarm have subsided. And an end-of-life signal enhances your safety by letting you know when it's time to replace the unit. Easliy connect them to compatible BRK or First Alert alarms within a single-family residence; connecting will sound all the alarms together.