Smooth edge and no scratch --- Polished smooth edges and silicone pads keep scratch from your device. Elegant and neat design suits for business, office, home and school use. Great office supplies for work. More stable and no sliding --- Unique shaft design enhances stability, increg load bearing. Fits all laptops 10-17.3 inches, such as MacBook, MacBook Pro, MacBook Air, Surface, Lenovo ThinkPad, HP, ASUS, Chromebook and other laptop computers. Rubber mats and feet protect your devices from scratches and sliding on your desk. Equipped with four 3.0-USB-Hubs --- This laptop stand also has four USB 3.0 ports along the back to plug in various accessories(charging cable, mouse, keyboard, etc.). Along with a separate USB power port to power the cooling fan.(A USB-to-USB cord is provided). Wide compatibility & Ergonomic adjustment --- This laptop cooling stand fits a variety of notebooks up to 17.3 inches. You will get the added benefit of adjusting the screen angle and height of the laptop according to what you prefer. Elevate the eye level to the screen, fix your posture, protect you from neck and shoulders pain. Large fan, Low Noise --- The built-in fan is large which the size is 140mm in diameter, it circulates faster and more air, prevent the overheating problem efficiently. Also it has blue LED light that light up when it running, it’s easy to know the fan is on or off.