The installation was very easy. Set receiver into the wall socket and ring tone and volume, battery in the transmitter, after that everything was ready.
The range is fine. Your room is on the ground floor and the receiver is located on the 1st floor. In between 3 walls, 1 corridor (about 5 meters long) and the staircase that leads upstairs. Above is still a wall, but the receiver works flawlessly.
The design is beautiful. Of the ringtones I like only the first (Ding Dong). The others are not my cup of tea. Others may see differently, but can not argue about taste it.
The volume is alright, but would be a bit louder nice.
On the whole I am satisfied with the wireless doorbell and it does exactly what I ordered it.
With a clear conscience I can recommend.