LED lighting R G B is installed under the cover. Built-in very quiet fans. They remove the heat generated under the notebook, cooling the notebook and reducing the operating temperature of its ó component, thus ensuring stable operation. The solid, sturdy construction easily supports the weight of the notebook. Powered by the notebook's USB port - power or external shocks are not required. No need to install. Durable, comfortable and easy to move. Compatible with all types of notebooks up to 17”. Esperanza BREVA divider has a functional telephone receiver. LED lighting RGB (10W mode) Adjustable fan speed ó 5 angle ó air flow : 65CFM Fan rotation speed, ó to: size: 1200 rpm materials: 2600-3000 rpm noise level: 26-30 dBA Seed: DC 5V Power: 5W USB port: USB 2.0 x 2 (one is used to power the stand) Fan dimensions ó: , 125 × 125 × 15 [mm] small : 70 x 70 x 15 [mm] Support dimensions: 390 x 255 x 38 [mm]