Since the fire service if they fit one stick it on a pole and use double
sided tape to stick it on the ceiling, perhaps after a while it falls off
and gets damaged? :-)
Brian

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"harry" wrote in message
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On Saturday, 30 November 2019 09:15:59 UTC, ARW wrote:
45% due to bad positioning, 20% no battery. So why did the rest fail?

https://www.bbc.co.uk/news/uk-england-50598387

How badly does it need to be positioned to cause it not to work?


Flat battery/fault in the device?- Plus some people/children can't hear
them.