Best tablet/laptop stand for office/entertainment, musician performance,lecture, w atching movie on Netflix Laptop/Tablet tray can tilt 90 degree up/down so you can place the screen face down to watch it while lying on bed/sofa/recliner Height adjustable, 360 degree rotate at Arm joint, Arm stretch & fold * best stand for bedside/floor/anywhere Compatible with Macbook/ Laptop 13 - 17.3"/ MS Surface Book (13.5. 15") and 7-13" tablet/smartphone/iPhone ( Compatible with iPad Air IPAD Pro 12.9",MS surface in tablet mode without keyboard) Height adjustable for best height. ( low 310mm:12.2 inch - 1020mm,:40.16 inch)