1)can one-handed operation, Both horizontal and vertical can be placed.
2) Adjustable view of the field to meet a variety of angles.
3) Internally rotating iron beads keep the desired angle without shaking.
4) Designed and developed for BMW 3 Series E90 E91 E92 E93 , only need to snap in the screw during installation and does not need to be pasted. It is like the original car, it is stable and does not fall off.
5) Does not block the warning light button.