Seeking a voltage transformer for our motorhome to be openly mounted. That's why a lot of my choice on this silver model. First I have to say that the converter does a really high-quality impression, the warŽs but already. He is almost 500mm long !! Other devices in this class are usually around 400mm. Specifying with 1700W is limited to 30 minutes. The actual continuous power is 1500W. Negative is that the connecting cables come out of the machine fixed and will not be back screwed. This makes an increase of the cable (70cm) very uncomfortable. Most annoying, however, is a loud humming noise, which starts immediately after switching on the converter, regardless of whether a load is connected or not. Since there was only one decision - back to Amazon. All Things Considered "pity" because my machine has fallen well despite the size.