Compatibility: Fits Laptop/Notebook up to 17, monitor up to 27 and supports weight up to 22lbs per arm. Mount plates detachable and height adjustable adapt to mounting holes 75x75mm and 100x100mm Multiple Adjustment: The high-grade arms extend, retract and are easily adjustable on an extra tall 31.5 height pole, providing +/-90° tilt and swivel to change the reading angle, and 360° rotate from landscape to portrait mode. Laptop tray can tilt 15° only