Product features: Flexible design to different notebook size from 7" up to 14". Surface Aluminum grill material to absorb the heat Two 14cm -fan to regulate airflow allowing constand vebtilation for notebook while in use. Anti-skid design to enforce notebook unit stabulity. Effcient USB power usage for twin-fans. Adjustable angle from 8 to 16 dgree Product Specification: Rated Current:250MA Rated Voltage:DC5V Rated Speed:2100RPM Rated Power:3W Suitable Models:7" 10" 12" 14" Noise:21dB Fan Dimension:140*140*15mm (Double big fans) Product Dimension:335*255*35mm Pls NOTE: We have six colors for this product: Red ,Blue,Green, Black, White, Purple . When you order, pls remark the color you want . If you not remark, we will delivery the Goods at Random . Thanks !