First Alert CO400B Carbon Monoxide Detectors, White Eco_Friendly Minimum Fastener Size : 1-1/8

Minimum Fastener Size : 1-1/8 in

Body Material: Glass Filled Nylon

Real-time measurement mode – walk-off measurements from the wall and other surfaces

Maximum lift 12'

First Alert CO400B Carbon Monoxide Detectors, White Eco_Friendly Minimum Fastener Size : 1-1/8Works during power outages. No installation required. Place or mount almost anywhere. Mute test button to quiet unnecessary alarms, test alarm function. 85 decibel alarm, low battery warning. Low battery mute quiets low battery signal for up to 8 hours. Front open compartment allows battery change without taking alarm down. Electrochemical sensor is the most accurate technology available for detecting carbon monoxide. End of life timer alarm chirps