Attention to potential buyers. It is not just the color that makes the difference between the models, even if they are from the same series. For example, the DST7020/20 & DST7022/40 do NOT have the auto off function that the rest from DST7030 and above have. I got the DTS7041, which has this additional feature, at a lower final price than the DTS7022 which does not have it. As a negative for the device, I would point out that the length of the cable (in all models) is 2m and I do not understand why they skimped on that one extra meter in the 7000 series which should have had 3m.

Very good product, it removes the salts from the special slot at the back, however it is quite heavy.