Electrochemical sensor technology detects CO gasEasy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included)Conveniently designed & portable: simple to install on a wall of your home or place on a tabletopGreen LED indicates power to the carbon monoxide detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxideEvent Memory records the last time carbon monoxide was detected or when the unit was last testedTest-Hush button makes it easy to test the carbon monoxide detector or temporarily silence the low battery chirp warningUL listed with a 10-Year limited manufacturer warranty on the alarm only (not a battery performance claim). Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that replacement is needed.
