Fire Angel Wi-Safe2 Wireless Interlink Carbon Monoxide Alarm for the Hard of Hearing W2CO10XT - AmplifiedTelephones.co.uk
Carbon Monoxide Detector CO Alarm EN 50291 Certified, Carbon Monoxide Alarm with LCD Display, Replaceable Battery Operated (Not Included 3 AA Batteries), CO Detector for Home 2 pack : Amazon.co.uk: DIY & Tools