1-inch ball head, compatible with 1-inch ball phone holders such as RAM and GoPro holders. Using elastic resin suction force with strong adsorption, keep stable at high speed racing. Can be adsorbed to any smooth surface like car windshield sunroof or window, outdoor street glass, tile place,icebox, desktop, and more. ON and OFF By Pressing one button: Easily install by press and lock the suction cup onto the windshield. 1-inch ball head, compatible with 1-inch ball phone holders such as RAM and GoPro holders. Using elastic resin suction force with strong adsorption, keep stable at high speed racing. Can be adsorbed to any smooth surface like car windshield sunroof or window, outdoor street glass, tile place,icebox, desktop, and more. ON and OFF By Pressing one button: Easily install by press and lock the suction cup onto the windshield.