10 Year Life Carbon Monoxide Alarm with Digital Display - Kidde K5DCO - £16.79 inc VAT
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Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with LCD Display and Test/Silence Button Conforms to EN50291 Standard : Amazon.co.uk: DIY & Tools
Fast Low Level CO Monitor (White) – Forensics Detectors
Kidde 10LLDCO Carbon Monoxide Alarm with 10 Year Battery & Digital Display - £23.88 inc VAT