This is just as removed form a wall with many years of over painting when on the wall. Ideal for someone that has the time to strip and re varnish. It is easy to turn into an external bell for you 200 series. Simply remove all the but the bells and connect one side of the coils to Blue with resister 3.3K and the other to white of line in. Plug into any socket into any telephone socket in the house and you have an extension bell ringer that will will ring and shut down when a telephone is answered in the house. The bells have been fully tested as working perfectly.