360-degree Rotatable Design This holder ensures to provide the best viewing angle ( you can choose a horizontal or vertical angle. The 360-degree rotational head adapter offers an optimum view for the driver and convenient use.  Stable and Easy Installation It's easy to install and release on the air vent or dashboard without any tools. Using a stable triangle design and safety buckle design, offer your mobile phone a super-secure base, and prevent your phone from falling when you are driving on rough roads.  Universal Compatibility Phone Holder Compatible with all cell phones and devices between 4.7-6.7 inches width (Support maximum 0.99" thickness device).