FreeBiz Laptop Cooling Pad, 12-17 Inches Cooler Pad Chill Mat 5 Quiet Fans LED Lights and 2 USB 2.0 Ports Adjustable Stand Height Angle (Blue) Ergonomic Comfort - Six-level height adjustable setting allow you use your workstation at the most comfortable view It keeps 12''-17'' laptop cool, such as Apple Macbook Pro Air, Hp, Alienware, Dell, Lenovo, ASUS, etc. 5 Ultra-Quiet Fans - Help keep your laptop cooler fast and reduce system crashes in a noise-free environment 5 Built-in fans (big fan: 5.9", small fans: 2.76") with Blue LEDs, two On/Off switches to controll 5 fans and LEDs seperately.(Simply press the switch to select 1 fan working, 4 fans working, or all 5 working together. The independent control is availiable for the LEDs as well) Dual USB hub allows for connecting more USB devices.Plug and play, no external power supply is needed, no software installation is required.Money back guaranteed,buy with confidence