Slim and smart design of the cooling pad system with large, high-performace and extraquiet 3 built-in fans which absolutely help to dissipate the hot air away fromunderneath the laptop computer for cooling down the overall temperature ofyour system 4 port USB 2.0 hub built-in Extremely heavy-duty construction of the cooling pad to afford any weight or pressureput on Power source supported easily by Plug-and-Play USB connection as a self-power modeConvenient, reliable and comfortable to carry No need for any installation Compatible with any laptop computers producing area:China payment:T/T supplying capacity:100,000pcs/month