ERGONOMIC NOTEBOOK COOLING STAND 901099 Features: This product is an ergonomic ventilated notebook stand, compatible with 10 "to 15.6" notebooks. Safety hooks and non-slip pads prevent the device from falling off the stand. Ergonomic 6-level height adjustment for a comfortable viewing angle. The quiet dual-propeller ventilation system improves computer life and performance. It has 2 side USB ports for connecting accessories (mouse, keyboard, smartphone, etc.).