Universal Security Instruments Combination 3-in-1 Hardwired Smoke, Fire and CO Alarm Detector 10-Year Sealed Battery Backup, Multi-Criteria Detection

Advanced Intelligence Detects Both Fast Flaming and Slow Smoldering Fires. AI-Artificial Intelligence Techniques Used to Classify Smoke and Carbon Monoxide Profiles. Microprocessor Virtually Eliminates Nuisance Alarms Caused by Everyday Cooking Smoke, Steam, etc. Detection of Polyurethane Foam in both Slow Smoldering and Fast Flaming Fires. Immunity to High-Voltage Current Surges. No Batteries to change. Lithium-Free 10-year Permanent Power. Meets New UL 217 8th Edition Requirements.