As well tell you right away, it's not my favorite (and not that of my colleagues elsewhere).
In the box, there is a basis (finally the transmitter) and a receiver. The base is positioned about thirty meters over the receiver. So there should not be any reception problems. But this is not the case !! (Ie it has a range of 200 meters). It should not be too many obstacles to it, otherwise it's hard to pick !!
The receiver crackles as soon as there was a noise (even outside with the window open) and not always hear the child crying. In fact sometimes we all know that there noise in the room, because the receiver sizzles !! When we should hear audible sounds ?? It is tiring as his !!
I do not like the quality of the enclosures. It really is quality "plastic" !!
To adjust the sound, simply turn the wheel so. But after a while, the different sizes of balls indicating differences in volumes, seffacent ...
Ah yes, the receiver if you want it without being connected must be equipped with batteries (and it consumes). So for economic reasons, we leave plugged on the outlet. Ditto for the issuer.
And I can not find it if it's ergonomic.
You have to have deep pockets to put and when it collided with the tab on a garment, and the large antenna is annoying !!
And last downside, it has a fairly short life actually. Well certainly it is connected all the time and work all day long, but still !!