Quite satisfied with the sound quality and displays the product. The doorman illuminates names the night, night vision is acceptable, and ergonomics of the whole quite satisfactory. My only complaint is the rather summary documentation, and asked me what the problem is the fact that the power supply (15V) must be close enough to the doorman (approx. 1 m) that the transformer is not an external model (so plan to arrive 220V near an exterior door is not always easy, especially to protect the transformer). I forgot, the maximum distance between the doorman and the combined is 20 meters with the original theoretical son and 30 meters. Personally I had to buy the cable in addition to go further (network cable that does not work, stranded card required 0.75mm², below we no longer sound).
