Dekcell USB Powered Aluminum Laptop Notebook Cooler Pad Cooling Stand with 3 Built-in Fans 3 built-in 60mm fans for maximum thermal heat dissipation. Compatible with USB 1.0 & USB 2.0. Built-in On/Off switch. 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 : &lt; 0.9 W / Current : &lt; 180 mA / Dimension (mm) : 300(W) x 240(D) x 40(H) Aluminum panel with heavy-duty design and silver anodized finish. Aluminum Cooling Pad are much stronger and much more efficient cooling pad than the typical plastic cooling pad in the market. 3 cooling fans adds additional cooling power than most of the 2 fans unit. Ergonomic designed angle for easy typing.