Bought for cooling an Asus netbook in 1015; perfectly fulfills this function; my pc will not slip; not too noisy; What interest 4 blue LED located at the center ventillo? The plastic that is all done Quincaille, should not have to make it fall! the design is not great but ... Lowlight: connected via a USB port, the socket is supposed replaced usb used. Wrong! already specified on the packaging that only a keyboard and mouse can be plugged in, any other energy ring road will not work too. And even my mouse no longer works! result, on my pc with only 3 usb port, not one left! And watch the son who by the USB plug, can hinder the port next door! Fortunately, despite everything, after operating hours, my pc boiling usual, is barely lukewarm, and that's the goal.