Smoke and Carbon Monoxide Detector, Smoke Detector, Carbon Monoxide Detector, Low Power and High Precision LCD Digital Display, 2-in-1 Household Smoke Detector : Amazon.co.uk: DIY & Tools
Worry-Free Sealed Lithium Battery Power Smoke/CO Alarm P3010K-CO | Kidde
Wireless Mini Carbon Monoxide Detector, CO Alarms Battery Powered with LCD Digital Display and Sound Alarm, EN 50291 CO Monitor for Home Safety (White) : Amazon.co.uk: DIY & Tools