On 11/03/2019 12:42, Graham. wrote:
1)Doorbells
2)Room thermostats
3)Keyless ignition
4)This:
https://www.dailymail.co.uk/news/article-6789479/

Bluetooth sound bars - necessarily installed just below the TV they
serve. (Which? says that many TV these days don't have audio outputs,
whether line or headphone.)

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Max Demian