Double Knob technology safely locks both the air vent clip and the magnetic plate position to maximize stability of the device Designed to be placed at a safe distance from the air vent to avoid disturbance of ventilation of airflow or temperature change Headball under the magnetic plate gives 360º rotational function for unlimited viewing surfaces Complementary Dashboard type stand (with 3M adhesive) included. Easily convert between the Air Vent type and the Dashboard type. Please Read - A metal plate on the back of your device may interfere with wireless charging. / Magnetic head needs to be used with a metal plate of any brand or an enclosed Ringke metal plate.