The devices also have the "mountain to mountain" the maximum range of 1km, although 8 Km are given; Ranging from a few hundred meters, the voice quality istz in my view quite well. The devices are very handy and easy to operate from 4-5 Jahrigen, make a professional device-impression.
Apart from the range (probably but the problem with all devices of the price range) I have to complain about here nothing ...