Overall rating: 4.5 stars **** +

The unit is for wall mounting and with a soil / wire ground (included) provided "all" for. Processing looks good; how durable is to be seen.
Small downer: manual is in English only.
During installation you should make sure that the device is not necessarily monitored frequently genutze way because the emitted radio frequencies by people with "good hearing" (especially children !!!) are perceived (can). This led us to the fact that our children stopped their ears ...
Have changed the location again and all is well :-)