Attachment 2 sec on the ventilation grill holds well on the grid and clamp well the laptop (I have an Iphone 3GS and Xperia). Outputting the cell there is a button which releases the clamps. You can spot a photo of the holder (the photo will be visible when there will be no phone in the clips) I saw this article on the highly rated magazine "autoplus" I do not regret the board and you.