USB Powered and Most Efficient Metal Cooler Pad with 3 Built-in Fans for Laptop Computer; 3 built-in 60mm fans for maximum thermal heat dissipation. Compatible with USB 1.0 & USB 2.0. Built-in On/Off switch; # Aluminum panel with heavy-duty design and silver anodized finish. Ergonomic designed angle for easy typing. Plug and play, no external power supply is needed, no software installation is required.# Airflow : 28 cfm. / Fan Speed : 1500 rpm / Noise: 25 dBA / Voltage : DC 3 V / Power : < 0.9 W / Current : < 180 mA / Dimension (mm) : 300(W) x 240(D) x 40(H), Brand new, one year warranty!