Thought this was a steal including the 2 9v duracell batteries and comes with a 5yr guarantee.
First Alert (in association with Lloydspharmacy) Carbon Monoxide Monitor
Carbon Monoxide (CO) is the Silent Killer you can"t see, taste, feel or smell it, CO can kill you before you are aware it is in your home.
Get an early warning Carbon Monoxide alarm.
?No installation required, can be placed anywhere
?Indicator light for power, service and alarm
?Convenient drop down alarm action chart
?Loud 85dB alarm
?9v battery and fixings included
?5 year guarantee