This product is very good. Making no noise operation, it effectively cools my 17 inch laptop. You can change the intensity of the fan (1 single large and quiet) with a dial and very practical, this cooler also USB hub office by adding 3 extra outlets. It is also possible to connect it to an AC adapter if you do not want to monopolize a USB jack of the computer. In sum, a product of very good quality that takes time and justifies its price. Please do not hesitate!