Descriptions: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;Extremely solid construction of the cooling pad to afford any weight or pressure put-on;Power source supported easily by the plug-and-play USB connection as a self-power mode;Convenient, reliable and comfortable to carry;No need for any installation;Compatible with any notebook computers;Air flow: 28 CFMSpeed: 1500rpmNoise level: 25 dBARated voltage: DC 5vPower consumption: <0.9wRated current: <180mAFan: 70*70*15mm( L*W*H)M.T.B.F.: 20,000hoursDimensions: 300*155*20mm( L*W*H)Weight: 557g