Cellet Car Windshield/Dashboard Universal Phone Holder for Smartphones- Black Easy expandable back button and foldable holder base helps securely accommodate the size of your smartphone Heavy duty arm with 360 rotation capability allow flexibility Extra-large suction cup with lock button conveniently attaches to dashboard, windshield or any other smooth surface and easily removable Rubberized holder keeps your device in place and can hold devices up to 4 inches wide Effortless maintenance of suction cup by wiping with a damp cloth