Carbon Monoxide Alarm

[meglet]

My boiler is in my son's bedroom. I have had it checked out by a corgi registered plumber (albeit a couple of years ago) and I have two carbon monoxide alarms sat on top of it which I replace annually. At the moment my boys are still very young and I have a monitor in their room so if an alarm sounded I would hear it through the monitor. When I eventually ditch the baby monitor I'm concerned I might not hear the alarm as they are shut in the boiler cupboard. Is there an alarm I can get that would have a repeater if some sort that I could put in my room? Or anyone have a suggestion as where I can look for one?

[TheChair]

https://www.sdfirealarms.co.uk/ei262-mains-powered-carbon-monoxide-detector-radiolink.html

[meglet]

This is exactly what I'm after, thank you.