I live in house stone walls 60cm, remote doorbell approximately 40m of the receiver and it works well, powerful and warm it must nevertheless I place the receiver on a socket height, probably this allows it to waves to pass in part through the window easier to cross a wall downside: large receiver in a power strip exceeds through it 10 cm x 5cm thick Another problem: if disconnected for reconnecting the selected ring is not saved and you return to the default ringtone last thing: the bell button is a bit cheap and not really protected against rain, this poses no problem because it is on battery (2cm long cylinder type) but I think it may fall down a few years so this is an assistive device but because of its poor quality may have to be changed often enough (2 to 3 years maximum)