Rely Combination Smoke & Carbon Monoxide Alarm – RealAlerts Voice & LED Warning System, AC Hardwired with 10-Year Sealed Backup Battery, Easy Install, Model 7400

Protect your home with clarity, confidence, and fewer false alarms. The Rely 7400 Combination Smoke & Carbon Monoxide Alarm features the RealAlerts Precision Warning System—an advanced solution that provides more than just a beep. With over 20 distinct voice alerts and color-changing LED rings, RealAlerts helps you immediately understand what kind of danger is present—smoke or carbon monoxide—and what to do next. It’s also the only alarm that lets you choose between English or Spanish voice alerts, so every household can get the information they need in the language they trust. Unlike conventional alarms that often alarm from steam or cooking fumes, the Rely 7400 uses smart sensing technology to better distinguish between real fire danger and everyday events. That means fewer unwanted alarms—and faster warnings when it really counts. This model meets the latest UL standards for both smoke (UL 217 9th Edition) and carbon monoxide (UL 2034), ensuring up-to-date protection across fire and CO threats. Designed for new construction or replacement of existing hardwired units, the Rely 7400 connects quickly using a universal mounting bracket and included wiring harness. The 10-year sealed backup battery provides added protection during power outages—no replacements needed. With Rely, detection and communication work together—because safety isn’t just about sensing danger, it’s about helping people respond with confidence.

• Know instantly what’s wrong – RealAlerts voice announcements and LED color rings clearly distinguish “Smoke” vs. “Carbon Monoxide” threats (RealAlerts Warning System).
• Get dual protection in one device – Photoelectric sensor reduces nuisance alarms from cooking or steam, and electrochemical carbon monoxide detection ensures accurate alerts.
• Install once for long-term protection – Hardwired AC power ensures continuous operation, with a sealed 10-year lithium backup battery for peace of mind during outages.
• Silence nuisance alerts safely – One-touch Test/Silence button lets you easily check operation and temporarily hush false alarms.
• Rest easy knowing it meets current industry safety standards – UL Listed to UL 217 & UL 2034, battery-operated for quick setup without wiring.
• Be alerted loudly when it matters most – Loud 85 dB alarm ensures detection is heard throughout the home.
• Replacement Alerts and Notifications – Stay informed about when a unit needs replacement with low battery and end-of-life alerts. Voice and LED cues clearly indicate both the issue and the specific room or location of the alarming unit.
• See status at a glance – LED status rings visibly display green for normal, amber for trouble, and red for alarm conditions.
• Enjoy peace of mind with warranty protection – Backed by a 10-year limited warranty.