TECHNICAL DATA: Fan speed:1200rpm Noise level: 21dBA ? Rated voltage: DC 5V Power consumption: <1.1W Rated current: <220mA USB 2.0 HUB 1 port Dimensions: 365x265x15mm" Notebook cooling pad with a modern, stylish shape. It has built a very quiet, backlit, big fan. It removes heat from underneath the notebook, cooling it and reducing the operating temperature of the components which ensures stable operation and longer battery life. Built-in 1-port USB 1.0 hub for easy connection of additional devices and does not take up space on the desk. Solidly constructed, durable design easily supports the weight of the notebook. It does not require an external power source - powered from the USB port of the notebook. On the side of a built-in power switch. No installation required. Durable, comfortable and easy to carry. Compatible with all types of notebooks.