Item Type: Monitor Mount Material: Aluminum Alloy + ABS Function: You Can Adjust the Angle of Looking Up and Down, You Can Switch Up and Down, and the Horizontal and Vertical Screens Can Be Freely Switched 360° Application: Suitable for PC of 12-17 in, Displays within 32 in 1、You can look up at the computer screen for office work, which can improve sitting posture, relax the cervical spine, and keep healthy  2、With free stretching function, it can be stretched back and forth according to the needs of the body to change the viewing distance  3、With adjustable top and bottom viewing angle, you can switch up and down and freely switch between horizontal and vertical screen 360°  4、The installation is simple, this product conforms to the ergonomic design, and the installation can be completed in just a few steps  5、The notebook tray is suitable for notebooks of 12‑17 in, which can meet your needs for different devices and give you a good experience