http://tinyurl.com/pzgdv8p<P>Ultra Low Level Carbon Monoxide Detector - CO Experts 2014Product Review<P> Click on the link for more reviews<P>Detects CO down to 7 parts per million! Others start at 25ppm!<P>Near instant reaction time to CO exposure<P>No Maintenance and No Calibration needed<P>Manufacturer warranty of 5 years!<P>Can be mounted freely on included stand or permanently on wall<P>
