tWith built-in silent cooling fan for protection against overheating tSuitable for laptops up to 17″” t5 Adjustable viewing angles and 2 additional USB ports tUSB powered, ON/OFF button to enable and disable the fan tNon-slip rubber feet The ACT AC8110 Multi-angled cooling board for laptop features a metal mesh surface with a powerful yet silent 12.5cm fan to prevent devices from overheating. This versatile stand can be used as a laptop stand or as a cooling pad. The AC8110 laptop stand for desk is USB powered so you don’t need an external power supply. The AC8110 can be adjusted to 5 different viewing angles to create the ideal working height. Moreover, the AC8110 adds 2 additional USB ports to your notebook. The non-slip rubber feet will keep the stand in place.