1.Slim and smart design of the cooling pad system with large. 2.high-performance and extra quiet 3 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. 3.Extremely heavy-duty construction of the cooling pad to afford any weight or pressure put-on. 4.Power souce supported easily by the plug-and-play USB connection as a self-power mode; Convenient, reliable and comfortable to carry. 5.No need for any installation; Compatible with any notebook computers. Specification Material:ABS Air Flow: 30CFM Speed: 3000rpm Noise Level: 21dBA Rated Voltage: DC 5V Power:1.3W Current:0.26A Fan:60*60*10mm(L*w*H) Dimension:270x 300 x 13.8mm(L*w*H)