The AVANTEK Air Vent Car Mount Holder for Cell Phones provides an ingenious mounting solution for your cell phones while operating a vehicle. With a fully adjustable ball joint, clips, and clamp with 360-degree rotation, this holder gives you the flexibility and durability to optimally use your device when driving. Hassle-Free Installation This air vent car mount phone holder is your best alternative for a hassle free mounting experience. The installation requires no suction cups, screws, adhesives, or glue. Simply clamp your phone holder on the air vent blades without any tools and it's ready to work! Furthermore, phones can be attached or released quickly and easily without using any other tools! Enhanced Security This air vent car mount phone holder boasts stunning stability. There are two clips strongly held against the air vent blades and a secure clamp, which holds your phone. This design securely fastens your device, even while driving on a bumpy road. In addition, there are rubber grips inside the holder, which not only hold the phone, but effectively protect your devices from any scratches. Assembly and Operation 1.Hold the clip with your fingers, rotate the rotary knob anti-clockwise to open the clip, and then rotate it clockwise to clamp the vehicle air vent. 2.Rotate the locking nut anti-clockwise to secure the clip. 3.Rotate the clamp to any position (e.g. horizontal, vertical, or an angle). 4.Stretch the clamp to firmly place your phone.