First Alert Carbon Monoxide Alarm CO-FA-9B Carbon monoxide is a dangerous gas which is invisible and odourless - and humans can't detect it. This First Alert alarm can. It releases a loud 85dB warning siren and is certified to quality standards for proven effectiveness. It can be regularly tested with the test/reset button, and the low battery warning lets you know when it's time to replace the batteries, for full-time protection and peace of mind. 85dB alarm at 1m distance Low battery warning Self-diagnostic check for sensor and battery Suitable for use in houses, caravans and motorhomes Kitemark certified to quality standards BS EN 50291-2001 7-year guarantee Where can I use this product?
