USI MCN400B Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with batt

FIRST ALERT Battery Powered Carbon Monoxide Alarm New Sealed

Smoke and carbon monoxide alarm Three PCs And Three Covers W/screws

Smoke and carbon monoxide alarm Two PCs W/screws

Kidde Hardwired Kidde App Enabled Smart Smoke and Carbon Monoxide Detector, A...

USI Sensing Plus AMIC1510SB Multi Criteria Hardwired Combo Smoke, Fire & Carbon

USI Carbon Monoxide 10yr. Tamper Proof Sealed Battery Smart Alarm

USI Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with New Sealed