Brand new product with high quality. It is 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. With special refinement construction, the cooling pad can bear any weight of notebook with balance, which without in the least of affecting usage of notebook. 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. Voltage: DC 5V