Easy to install Turn 3 cams clockwise to open bearing seats,counterclockwise 3 cams to close bearing seats.Press and hold the button on the top of the back of the phone holder for 3 seconds, open the side clip, then place the phone. Hold the side clip with one hand, and it will firmly hold the phone, the unlock button allows you to unlock your phone easily. User-friendly Design The cup holder holder adopts rotating base, and the Clip is glued with non-slip rubber pad. It consists of a sturdy adjustable base, a durable flexible hose and delicate Clips. Suitable for cup holders with a diameter between 6.6cm and 9cm. The stand cup holder sits comfortably and perfectly on the cup holder of a car, golf, trolley, boat, truck or SUV. Perfect substitute for the traditional cell phone holder If you go out to sail but there is no suitable place to put the phone, and you don't want to put the car phone holder in the air vent to damage the ventilation system, or install the phone holder on the dashboard to leave residual glue. You can use the cup holder the car phone holder to install in the cup position. Wide Compatibility Clips can be opened for 4 inch.YIAERM Car Phone Holder is compatible with most 4-7 inch smartphones.Compatible with iPhone 13 Pro 13 Max12 pro max mini 11 iPhone X XR XS 8 8Plus 7 7Plus 6s, Samsung Galaxy S22 Ultra S21 S20 S10 S10+ S9+ S9+ S8 Note 9, Google Pixel 3 3XL, Nexus 5 5X 6P, LG V35 V30, Sony Xperia XA2 XA1 Moto G X, Nokia 8 6 Oneplus 8 7 6T 6, HTC Nokia etc.