It does what it says. Good range, even between floors, the signal passes even with underfloor heating copper pipe installed. Easy to install. No complaints.

Very good and powerful.
Unfortunately, one of the receivers burned out in 7 to 8 months, even though I have a UPS, the warranty did not recognize it

Very good purchase. It worked without any problem and it is very easy to use. The most important thing is that you can adjust the volume of the sound!

Canary! Very powerful with stairs, for example, one in the living room at a very low level while the other in the kitchen at maximum power. The receivers have an adapter for 220v, while the button comes ready with its battery installed. Blue light on the button and receivers, many melodies with each terminal if you want it to have a separate one, no range issues, instructions in Greek.