Feature: 1.Suitable for tablet or smartphone whose width is between 12cm/4.7” and 19.3cm/7.5”, 4-11 Inch Tablet PC Phone. 2.For cars whose rear pillow width is approx. 10.3-17.7cm/4-7”, rear pillow 3.Hard tube diameter is about 1.4cm/0.55". 4.360° Rotation Car Headrest Mount, Rotatable ball pivot allows you vertical viewing and horizontal viewing. Prevents your tablet scratching, pressing and other unwanted damage. 5.Environmentally friendly plastic, non-toxic harmless, rest assured to use. 6.Convenient in car use, supports handsfree movie enjoyment, or e-book reading, game playing and so on without long hours wrist fatigue by hand support during long driving period.