The dashboard car mount holder with universal mount allows you to drive effortlessly by optional installations and easy operation. Optional Installation Either stick to your dashboards and windshield with powerful suction pad. It will get stuck firmly. Keep your cellphone in place without worrying road vibrations. Optimal Viewing The car mount holder can be adjusted to the perfect viewing angle with its 360°flexible ball head. Adjustable Height Enable you to adjust to the suitable height by the adjustment knob that connects the base and the ball head. Sturdy Structure The stability of the mount on the dashboard relies both on the super suction cup with sticky gel pad and the specially designed structure to reduce the whole force moment. Air vent mount holder ensures a secure fit onto your air vent. Wide Compatibility 1.6-3.5 in arm width range to adjust. Compatible with most cell phones up to 6in including iPhone, Samsung, Sony, Google, LG, HTC, Blackberry, etc.Note: Once the product is fixed, try not to move, keep good sealing, prevent air from entering the suction cup. If you have to move, please press the suction cup base first, exhaust the air, and then adjust the gear. Tip: Sprinkle a little water in the place where the sucker is fixed, and the fixity is better.