The Golden Triangle Law, with stable support, can firmly secure your phone to the ventilation hole. The hook will grab one of the car's ventilation blades, and the spring clamp plate and fastening nut will provide absolute fixation. This car mounted mobile phone holder has a stable trapezoidal structure fixture with an enlarged circular buckle that cannot be thrown off, better preventing the phone from falling off. No matter how bumpy it is, it will not fall out like other products.One handed operation, easy to release and close. The car mounted air outlet phone holder comes with a quick release button and adjustable clamping arm, making it easy to insert and remove the phone with one hand. Whether you are on the phone, navigating, listening to music, or charging, we can provide you with a safer driving experience.The 360 degree rotatable head will provide you with the best viewing angle, so you can clearly see the phone screen and maintain safe driving, without being limited by the viewing angle or bulky car phone holder. You can place your phone in any direction (horizontal, vertical, etc.), and using this car hands-free ventilation hole phone holder can easily ensure driving safety. It is compact and does not block the air ventsReserve a charging port, stabilize the bottom of the phone holder, facilitate charging while driving, and maintain battery life without power outage. Precision gear ring interlocking, built-in silent partition, away from noise interferenceWider compatibility, suitable for all phones and smooth phone cases: Mobile phone holder with adjustable bottom tray, stable compatibility with 4-7 inch phones Apple iPhone 13/13 mini/13 Pro/13 Pro Max/12 mini/12 Pro/11 Pro max/XR/X/8/7/6/5, Samsung Galaxy S20+/Note10/S20 Ultra/S10/S9+/S8 Note 8; Car phone holder