Kidde Carbon Monoxide Alarm with Digital Display, 21010047

Worry Free 10 year sealed Carbon Monoxide Alarm with Digital Display features a sealed-in lithium power supply; no battery replacement required over the 10 year life of the alarm. Eliminates worry about battery removal or unauthorized deactivation of alarm. Alarm automatically activates when attached to the mounting bracket. Digital display shows CO level in parts per million. Updates digital reading every 15 seconds. Event memory feature flashed the Red LED every 60 seconds t alert that a high level of carbon monoxide has been detected within the last 14 days.