DEEPCOOL N9 Black Laptop Cooler, 2.5mm Pure Aluminum Panel, 180mm Fan with Adjustable Speed, 6 Adjustable Angles, 4 USB Ports, 2 Anti-Slip Baffles with Adjustable Distance, Support up to 17" 2.5mm thickness Pure Aluminum Panel with shape of wave. Max wave height reaches 6mm 180mm fan with adjustable fan speed of 600150~100010%RPM 4 USB ports. One USB port can be used to power the cooler, while the others can be connected to external USB devices 6 adjustable usage angles offer more options for achieving user comfort Provided with two anti-slip rubbler baffles. Distance between these two buckles can be freely adjusted according to notebook size