Cubeternet Premium USB Powered Metal Cooler Pad with 3 Built-in Fans for Laptop Computer 3 Built-in 60mm fans with mesh for maximum thermal heat dissipation for your laptop, Apple Mac BookPro, Ultrabook, notebook or netbook Sturdy metal panel with heavy-duty design and silver anodized finish Ergonomic designed angle for easy typing USB Bus-powered (no external power supply is needed) with Built-in On/Off switch Airflow : 36 cfm./Fan Speed : 2500 rpm/Noise: 25 dBA, Dimension (inch) : 11 3/4(W) x 9 5/8(D) x 1 3/8(H)