System USB1.1 or 2.0 Port, MacOS 9/MacOS X/Win98Se/Me/2000/XP
Features  Slim and smart design of the cooling pad system with large, high-performance and extra quiet 2 Fans built-in which absolutely helps to dissipate the heat-air away from underneath the notebook computer for cooling down the overall temperature of your system full Aluminum Heat Sink, lightweight and easy to carry Built-in USB2.0 4-Port Hub

Two Silent Cooling Fans, with On/Off Switch
Environmental Protection Design, suitable to Human Engineering. (Low-front)