Does what it’s supposed to do.
The unit is really well made with the bell push (touch screen) easily fixed to door by either the screws or adhesive strip provided.
The bell unit is plugged in to any socket, it will then pick up the signal from the bell push.
Loud (volume can be adjusted) with a selection of different choice of different tones.
Great for those areas where hearing the door go is difficult.
Comes complete with all fixings plus batteries for the bell push..
I highly recommend this item.