eMylo Smart Wireless RF Remote Control Switch AC 220V Relay Module 1000W 1 Channel RF Motor Remote Control Switch, 2 Transmitters with one Receiver

The receiver may not comply with wiring regs unless you put it in an insulated box. Unless you have a bit of a clue about electrics it's probably not for you, you have to be careful how you wire it up because it's a very small device with terminals very close together. If you do know what to do with it, though, it's excellent value. Have been using it for switching lights in an outbuilding for months and it still works well. Mine did actually come with batteries in the remotes, when I bought it it wasn't clear that it did so I added some to the order to be safe.

all good