ThreeLeaf@T1 15-17" 3in1 Laptop Cooling Pad (Dim-speed Switch and 5Levels Multi-angle Stand) 2"x 6Fans [Super-Thin&Wide Compatibility]: Designed for 15-17inch laptops with "0.99inch SUPER THIN", satisfies different cooling demands for Office/Entertainment/Media [Front Dim-speed Switch]: No more "LED GLOW",just one touch to turn off all led lights when u dont need them. Same time fans speed can be adjusted in 5stages,that means dont need work at fully speed all the time,quite energy-saving . [5Levels-Stand Adjust]: Ergonomic 10deg height lift each ensures A better comfortable "VISUAL OR TYPING ANGLE" to relieve wrists&shoulder aching after long-time mouse&keyboards exercise.In addition,"20% MORE AIR" is pulled from backside gap in test,and u can apprantely feel the airflow through the pad holes. [Powerful 6fans Motor]: Copper-coil winding feature of internal fans can bear thousands of spinning to ensure much longer lifetime. Also 6fans powerful movement provide A sufficent airflow for cooling. (2"x6pc small) [2USB Ports]: One for power supply from notebook , the other for Mobile/U disk,U wont miss any portable USB devices at all with the cool mat.