Waterproof: The product is out of waterproof and easy to clean and the shape is more stable and durble Tough crack resistant : The product uses high elastic glue each joint has screw fixnation. the crack is more stable. The spherical yuntai : Spherical yuntai bearing quality is strong , flexible , can be 360 true freely . Universal screw can be used for iphone ,ipad, gopro, micro single camera and card machine.