Features: Reduces the temperature of your notebook computer for maximum performance Ergonomic designed angle for easy typing Aerodynamic aluminum housing for thermal heat dissipation Super quiet fans, ideal for quiet environments Easy Go. No adapter necessary Powered by the notebook's usb port Supports notebook computer up to 17-inch Specification: Materials : Pure Aluminum, ABS Weight : 2.7 Lbs Dimensions : 310(L) X 372(W) X 40(H) mm Fan size: Two (60) X (60) x(20) mm Bearing Type : Hypro Bearing RPM : 1,100 - 1,500 rpm Noise : 18.0 - 25.5 dBA Input Voltage : 5V (Connects with Notebook USB Port)