Designed only for medium to large mobile phones (minimum 67mm, maximium 90mm in horizontal width including case, if any) Instant and Automatic One-Touch Lock Mechanism: Simply mount the phone such that the back of the phone pushes against the lock button Dual Purpose: Can be used both on car windshield and dashboard (only by using the 3M dashboard disc provided along) Pure ABS material with rugged scratch-proof matt finish 360 degree rotation for optimal viewing Super strong, heat-resistant, silicone suction base 3M disc included for dashboard use and the holder cannot be used on dashboard without the dashboard disc Ensure surface is spotlessly clean before affixing the holder on the windshield or dashboard disc