"Bought this after a close relative had a major carbon monoxide scare. And it gave very salient info no more than 7 days after purchase when the alarm went off to warn about the monoxide levels in a room with an open fireplace. Feel much more confident having this close by. Well worth it!"

Fantastic little unit, which is considerably better than those of just a decade ago. This is a neat portable unit that is about the size of a business card square 76mm x 76mm. It is a stepped design to go into a wall bracket and doesnt look or feel the fact this is 25mm thick. It is easy to read, mute alarms and set warning levels. The alarm is a piercing 85dB. Measurement is ppm of CO. Amazingly this is powered by a Lithium Battery intended to last 10 years - the lifetime of the product. Even more amazing is the 10 year warranty that comes with this, in otherwords this has a lifetime warranty! Great as a holiday portable item or as a test to other convensional installations. A must buy and excellent product - happy to recommend, Andrew

Superb - and small - Carbon monoxide monitor that comes complete with a sealed 10 year battery! The installation is easy - a small bracket is screwed in situ and the monitor simply slips on. All necessary screws are supplied. I won't have to buy another for 10 years!I've photographed the monitor beside a regular ball-point pen to show t's small size.Very pleased with this purchase.