7-level adjustable height helps to choose a perfect and comfortable angle for your eyes and cervical spine, get rid of the soreness of cervical discomfort. Elevate your laptop to the perfect height, prevent hunchback, relieve neck and shoulder pressure. Small size, easy to carry, suitable for home, travel, office. Adopt anti-slip silicone to enhance friction, the notebook is not easy to slide, more stable typing, effectively reduces the damage caused by friction between laptop and bracket. The bottom is hollowed out to enhance air circulation and speed up heat dissipation.