Kidde Carbon Monoxide Alarm. 4 star model rating! Works during power outages when used with a 9v battery. Has a large digital display, recalls highest CO level detected, provides an updated digital reading, has a test/retest button, has a loud 85 decibel alarm, and 3 convenient mounting options. 5 year warranty. The item will be available for pick-up at Vermont Gas Systems on Swift St. in So. Burlington.