The base mount is designed with four joints and three arms that only controled by a specially upgraded knob, allowing the arm to fold and lock easily.Provide drivers with a safe and comfortable navigation angle, which is flexible and not cumbersome. The head and tail arms can rotate 360 degrees and adjust 90 degrees, while the middle arm can rotate 360 degrees and adjust 180 degrees, easily achieving the position, angle, height, and length you want.