- New - Free Postage - Posts Same Day Compact, slimline case. Dimensions = 127mm x 73mm x 39mm. Weight = 170g. 10 year sensor lifespan. Powered by two replaceable AA batteries (supplied). Warning "chirp" and digital display message indicates when batteries are low. Digital display of CO levels from 30ppm. Detector alarms from 50ppm. Kitemarked to BS EN 50291-1 (domestic use). CE and UKCA marked
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