Ideal angle of phone when mounted is between 35 and 45 Degree angle to avoid dislodging over heavy bumps. Fits any size Phone or IPad . New patented infinity bracket can clip into any horizontal, vertical seam, Inside edge of air vent, air vent louver or 3M peel and stick to any flat or slightly curved plastic dash trim. To use bracket check clearance in dash seam with a credit card. It may be neccesary to use the adhesive strip method. DOT compliant, one finger operation when mounted. (state Laws). Bond increases When screen is pressed, most other mounts phone will dislodge. Award winning one piece design is warrenteed for life (by the manufacture). Revolutionary design uses pure physics and just the weight of your phone to secure your phone in seconds. Universal, fits any size phone and case.