30CUAR‑21031529 Combination Smoke & Carbon Monoxide Alarm (Hardwired with AA Backup)

The 30CUAR‑21031529 is a premium, hardwired combination smoke and carbon monoxide alarm designed to provide fast, reliable detection and whole‑home safety. Featuring both a photoelectric smoke sensor and an electrochemical CO sensor, this device delivers precise hazard detection while reducing nuisance alarms commonly caused by everyday cooking or steam. Its intelligent sensing technology helps ensure your home receives earlier warnings, giving occupants more time to evacuate safely.

Powered primarily by 120V AC, the unit includes two replaceable AA backup batteries, allowing continuous operation during power outages. With interconnect capability, this alarm can link with up to 24 compatible smoke, CO, and heat alarms—ensuring that when one device detects danger, every interconnected unit sounds, improving response time throughout the home.

The 30CUAR‑21031529 is designed for easy installation with a twist‑and‑click mounting bracket and offers LED status indicators, self‑testing functionality, and an 85 dB audible alarm for strong, clear alerts. Its compact 5-inch profile is ideal for bedrooms, hallways, living areas, and other residential environments requiring dependable fire and CO protection.