Your laptop can breathe easily with this ultimate laptop cooling pad which extends the life of your laptop.2 quiet cooling fans help to dissipate the hot air underneath the laptop for cooling down the overall temperature of the system. USB powered - Simply connect the cooling pad to the laptop usb port.4-Port hub are specifically designed to satisfy the needs of users who need to combine a powerful laptop cooling solution. - Main color: Black - Model: IT-6391 - Material: ABS - Extended size: 29.5 x 15 x 2.5cm - Built-in double fan - Rated Voltage: 5V - Cable length: 36cm