The fact that the fans should be more for looks and not for the air flow there, I knew before buying. That, however, does not light up three LEDs with a copy, was not provided. Quality assurance, there is probably not in this price range. They run exactly 750 rpm and are fairly quiet even at 12V, but a throttled to 750 rpm BeQuiet Silent Wings 2 or a Noctua NF-A14 PWM is simply quieter; there must not expect too much from the Apollish you. The cable wires to fan hub have hung in two copies in the rotor blades, if I would not have noticed and fixed, each with a small cable ties. Quality looks different ...