I'm after a doorbell (preferably one which has two or more sounders) which doesn't use batteries at all. I.e. both the button(s) and the sounders are mains powered. I don't even mind all that much if wire is required between the button(s) and the sounders but wireless would be easier.
Are there any out there? I can find quite a few with mains powered sounders but they still have battery powered buttons.