15" - 17" Notebook Cooling Pad QOOpro C-008B The Notebook Cool Pad avoids overheating and extends the lifetime of your notebook. A big single and very quiet fan provide pleasant working conditions and the ergonomic shape supports relaxed working. Just connect the Cooling Pad with the laptop via the included USB cable to connect the included 2 port USB HUB and power the fan, an external power supply is not needed. Specifications No external power supply needed to power the integrated FAN Integrated 2 Port USB 2.0 HUB Connection through the USB port with the included Type-A USB cable Plug & Play Low, almost silent noise Approximate Dimensions: 350 x 270 x 40 mm Weight: 870g Material: Plastic Fan Size: 200 x 20 mm Fan speed: 600 - 800 rpm Max Noise: 25.3 dBA Nominal voltage: 5V DC Operative voltage: 4.5 - 5.2 V DC