We've got this one, had it for years and no issues. Works well, completely wireless so the only minor drawback is you have to remove it to charge it from time to time. Doesn't take long to charge and it's only once a month or so. https://amzn.eu/d/0fTPORA9
https://www.amazon.co.uk/blink-vide...Ufji5iD9aO43MiDe84clO-C0tDxAcHi98HvE_tOZ4JS4u Battery or connect to existing door bell
Third Eye Communications. They poke about a little bit at first but can see anyone cumming towards your front door. Not bad at the back either but that's extra.