The fan itself is not all light, it's a good sign, which is heavy in high tech is often of quality and here we do not cut this adage. The quality of the plastics and the overall finish are high. The supports integrated rubber with no attachment are well finished. The cable is braided and wrapped, neither too rigid nor too soft which is perfect to carry a cable passage descends into its box.
The product is provided with many more or less useful accessories according to what is desired to use as the fan. The extension cord that has a full-sized housing is essential. The speed adapters can be useful if the mother board not well regulated and if you do not have Rhéobus. Converters for power plug into the molex (plug that should no longer exist ...) are also present. Finally small rubber studs for securing the fans are present but little useful and elegant because of their protuberances necessary for their assembly.
The noise 5V: null, the only we hear very closely (word of 5cm of the box) is the airflow.
7V noise: an air flow a little more present and so that means when working side (on desktop pc)
The noise 12V: lots of air noise so loud and somewhat bearable to use.
The flows are substantial, even 5V; with respect to competition. This fan is designed to be used as case fans, no need to turn the fort in 99% of situations. The minimum speed is sufficient to provide fresh air and expel warm air from the case.
As always therefore a reference. However, less frills in English on the cardboard, cardboard least (two flaps) and goodbye molex would certainly lower the price to less than 20 and is more environmentally friendly and more economical.
I strongly advise that want to silence and good air flow. Caution large budget to replace all the original fans of a tower. But the result is worth the effort. For in use on a TOP location in hot air extraction (top of housing) above the processor was able to reduce the temperature thereof to about 2 ° C and 3 ° C IDLE in LOAD.