Universal Security Instruments, Sensing Plus, Combo Smoke, Fire, and Carbon Monoxide Alarm, Multi-Criteria, with 10-Year Battery

The USI AMIC3511SB 3-in-1 Sensing Plus Smoke, Fire & Carbon Monoxide Alarm provides 10 years of continuous, maintenance-free protection. Sensing Plus Multi-Criteria Detection combines the benefits of photoelectric and ionization technology to detect both fast-flaming and slow-smoldering fires, plus life-saving carbon monoxide detection. Ideal for houses, apartments, and mobile homes, it features a sealed 10-year battery that never needs replacingsaving money, preventing low battery chirps, and reducing waste. Microprocessor intelligence minimizes nuisance alarms, while the silence/test button and end-of-life warning add convenience and safety. Installation is simple with a quick-activation pull tab, deactivation key for safe disposal, and a large mounting base to cover wall imperfections. This alarm meets UL 217 and UL 2034 standards, is California State Fire Marshal and FHA approved, resists false alarms from cooking, detects polyurethane foam fires, and withstands power surges.