Notebook pad for notebooks up to 17.3" with a built-in fan for cooling the device. Ergonomic design with 5 different height settings for optimal viewing. Viewing angle adjustable from 6.5° to 45°. Built-in 14cm silent blue LED fan with automatic fan control speed. On/off switch for cooling system. Two anti-slip props with adjustable width settings. Built-in 2-port USB hub for connecting other devices.