Samyo 12-17 Inches Aluminum Surface Foldable Laptop Computer Notebook Cooling Cooler Stand Pad with 2 Built-in LED Light Super Silent Fans USB Powered Provides high cooling performance. With Aluminum surface and Two 140mm silent fans, works very silently. Portable and slim, lightweight construction. Support size:12"-17"laptop. Tilt scheduling design, 8 degree height adjustable, take full account of human health. Anti-slip design ensures notebook safety. Powered by USB cable from laptop. No need any installation.