There are no speed data here and what is the statement "free return under warranty"? First of is the statutory guarantee of 2 years! Since you have in case of a defect anyway a free return right ..... very suspicious and questionable whether the higher price compared to other, for example Trans cents (currently 17 euros), really worth. I try first the cheaper and if it does not bring I look times after another. However, after this last because no technical specifications except the size of this stand.