Sealed Battery Carbon Monoxide Alarm, Lithium Battery, 4.5 x 1.5 x 2.75

Quick Overview

Sealed-in lithium battery requires no replacement over ten-year lifespan.
Easy to install; self-activating.
Test/reset button tests unit for proper operation and resets carbon monoxide alarm.
Green LED flashes every 30 seconds, indicating unit is operating properly.
Red LED light indicates dangerous carbon levels; accompanied by loud alarm pattern.