Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup. 10-Year Factory Locked Battery Backup. 10-years of continuous protection with no battery change required and protection during power outages. Advanced Smoke & CO Protection. Advanced sensing technology for early warning and less cooking nuisance alarms. Latching alarm indicator, visually identifies unit that initiated alarm or low battery. Smart Interconnect, interconnects with most First Alert and BRK alarms. When one alarm sounds, all compatible alarms sound (up to 12 smoke alarms and 6 other CO/heat alarms). Test/Silence Button, temporarily silence or test the alarm with one-touch easy access button. Dust Cover, keeps alarm clean during construction.
