The USI Electric AMI1061SB Sensing Plus 2-In-1 Smoke And Fire Alarm Has Advanced Intelligence That Detects Both Fast Flaming and Slow Smoldering Fires. Built-In AI Is Used To Classify Smoke And Fire Profiles. Our Microprocessor Eliminates Nuisance Alarms Caused By Everyday Cooking, Smoke, and Steam. This Hardwired Unit Comes With A 10-Year Sealed Battery With End Of Life Signal.Advanced intelligence detects both fast flaming and slow smoldering firesAI-artificial intelligence techniques used to classify smoke and fire profilesMicroprocessor virtually eliminates nuisance alarms caused by everyday cooking smoke, steam, etc.Detection of polyurethane foam in both slow smoldering and fast flaming firesImmunity to high-voltage current surgesNo batteries to change-everLithium-free 10-year permanent powerAlkaline batteries are safer and more eco-friendlyMaintenance-free battery power provides 10-years of safety protectionTamper-proof design prevents battery removalSilence/test buttonLED power status indicatorEnd-of-life signalInterconnectable up to 24 USI unitsQuick find alarm location feature