Fantastic Design C138 Yesido To ensure that the shell can be securely sucked, you can use the pressure valve to create a negative pressure vacuum environment at the bottom. You can position your phone at any angle and in any location thanks to its 360-degree rotating ball joint and telescopic arm that can be adjusted. The car phone holder is very versatile and can be used either vertically or horizontally, making it easy to move around and answer calls. You can concentrate on your motivation.