Combination Smoke & Carbon Monoxide Alarm SC01 with LCD Display

Wireless Interconnection: If one alarm detects a threat, all interconnected alarms will activate to sound a warning Full Home Protection: Up to 24 Link+ smoke alarms, CO alarms, and combination alarms can be interlinked for maximum coverage 10-Year Sealed Battery: Contains a long-life lithium battery that powers the device for its entire 10-year life 2-in-1 Protection: This combination alarm protects your family against two dangers-both smoke and carbon monoxide Premium Material: Made from an upgraded PC material that is heat-resistant, high-temperature resistant, and corrosion-resistant