A mechanic remote - I like that

[Lampie519]

That shouldn't be too difficult to realise actually.
2 frequencies for up/down and maybe an additional for mute....
A receiver with filters (discriminators) for these frequencies...

Here we have the first "Joy stick" remote (sort of remote as it was build-in) of a Philips radio (1937):
https://home.hccnet.nl/piet.blaas/monoknopdw.htm

 

[tonyEE]

Unfortunately FOOLS are playing through the nose for the remote clickers...

WHY? They can't use them.

https://www.ebay.com/itm/1257379505...yu3uZvW4sHfzz%2FY%3D|ampid:PL_CLK|clp:2047675

 

[myleftear]

I like the seller’s description:
„Item description from the seller: - professional service. - great prices.