Feature 1You can look up at the computer screen for office work, which can improve sitting posture, relax the cervical spine, and keep healthy 2With free stretching function, it can be stretched back and forth according to the needs of the body to change the viewing distance 3With adjustable top and bottom viewing angle, you can switch up and down and freely switch between horizontal and vertical screen 360 4The installation is simple, this product conforms to the ergonomic design, and the installation can be completed in just a few steps 5The notebook tray is suitable for notebooks of 1217 in, which can meet your needs for different devices and give you a good experienceItem Type: Monitor MountMaterial: Aluminum Alloy + ABSFunction: 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 360Application: Suitable for PC of 12-17 in, Displays within 32 in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Base1 x Bracket Arm1 x Base Holder1 x Wrench12 x Screw1 x Base Cover1 x Bracket Arm Buckle1 x Computer Base1 x User Manual