X-Sense Interconnected Smoke and CO Detector Combo, SC01-W, 6-Pack

From the brand

Standalone Model

Interconnected Model

10-Year Sealed Battery: Contains a long-life lithium battery that powers the device for its entire 10-year life
Wireless Interconnection: If one alarm detects a threat, all interconnected alarms will activate to sound a warning
2-in-1 Protection: This combination detector protects your family against two dangers – both smoke and carbon monoxide; tested and certified to meet UL 217 and UL 2034 safety standards
Large Mounting Bracket for a Clean Finish: Our extra-large 5.7-inch bracket covers more area than standard small ones, easily hiding old screw holes and ceiling stains from previous alarms; installation looks neat with no need for patching
Test/Silence Button: The single push of a button will either test or silence all units in the system