X-Sense Wireless Interconnected Carbon Monoxide Alarm, Replaceable Battery Powered CO Alarm with Digital Display and Peak Value Memory, Complies with EN 50291, XC01-WR (RF Interconnected), 2-Pack : Amazon.co.uk: DIY & Tools
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Smoke & Carbon Monoxide Alarm with Digital LCD Display, AEGISLINK Combination Smoke and CO Alarm Detector with 10-Year Lifespan & Replaceable Battery and Test/Silence Button, SC200 : Amazon.co.uk: DIY & Tools
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