First Alert Voice and Location Alert 2 in 1 Smoke and Carbon Monoxide Alarm 10-Year 2 Pack

First Alert 2-in-1 Combination Smoke & Carbon Monoxide Alarms First Alert combination smoke and carbon monoxide (CO) alarms offer 2-in-1 protection from both types of danger with a variety of feature offerings to deliver advanced and reliable fire protection to help protect your home and family. Precision Detection Combination Alarms Meet New Standards Precision Detection advanced sensing technology meets the latest industry standards to reduce cooking nuisance alarms and detect smoke from synthetic materials to help provide an early warning. 10-Year Sealed Battery Combination Alarms 10-year sealed battery alarms eliminate the need for battery replacements and late-night low battery chirps for the life of the detector. Hardwire Combination Alarms Most hardwire alarms contain a hardwire adapter plug that makes installing the combo detector easy and eliminates the need to rewire. For protection during power outages, the device offers a back-up battery feature for continuous smoke and CO detection. Battery-Operated Combination Alarms Battery-operated detectors are easy and convenient to install throughout your home for additional protection.