I have the Cooling Pad have now are mainly in use for several weeks and am very happy I damit.Da my notebook while working on your thighs, my temperature was permanently to unangenehm.Also had a Cooling Pad her.Habe me then the reviews fought - Thanks Amazon that there is !!! - And I'm stuck with this one remained. Technical details I can not give, but I can say that it perfectly serves its purpose. My 17 inch laptop has a good grip, the noise of the fan is very quiet and not disturbing at all, my thighs and the notebook keep a comfortable temperature, even at very long use, and the price is just great. Can thoroughly recommend it so.