Universal Security Instruments Combination 3-in-1 Hardwired Smoke Fire and CO Alarm Detector 10-Year Sealed Battery Backup Multi-Criteria Detection AMIC1510SB

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.

Multi-criteria detection

Smoke and carbon monoxide sensors conform to new UL 217 8th Edition standards

Hardwired with lithium-free 10-year battery backup

Tamper-proof design prevents battery removal

No batteries to change-ever

Lithium-free 10-year battery backup

Alkaline batteries are safer and more eco-friendly

LED status indicator

Inter-connectable up to 24 USI units

Base diameter: 5-5/8 in.