Specification : NC11 2 Steps height adjustment Built - in USB Hub Fan Size : 125mm (x2) Fan Speed : 1000, 10% RPM USB Port : USB2.0x2 Rated Current : DC 5V Rated Voltage : 0.8 A Rated Power : 1.75W Material : ABS Plastic + Metal Mesh Dimension : 340 x 265 x 30 mm Suitable for 9-15.6" Laptop