FireAngel 10 Year Carbon Monoxide Alarm - Sealed for Life Battery FA3820 Twin Pack | Toolstation
Manutan Twin Optical Smoke and Carbon Monoxide Alarm Set Contains 1 x CO Alarm, 2 x Optical smoke alarm. Gas Detection Monitors Fixed | Fisher Scientific
FireAngel TCO-9XQ Wireless Carbon monoxide Alarm with 7-year battery, Pack of 2 | DIY at B&Q
FireAngel FA3820-T2 CO Alarm with 10 Year Sealed For Life Battery - Twin Pack | Wickes.co.uk
Kidde Lifesaver Carbon Monoxide Alarm 5CO Twin Pack on OnBuy