Good purchase, shipping well, after testing it, i can say: it's great, silent and effective. The wheel for speed works correctly. I hit him with an external battery (like the one on the mobile) and so it didn't take power off the laptop. Very happy and with the attachment i have made to you, it is totally autonomous.
The goods arrived in 3 weeks, delivery to the house in the Moscow region. There are no external defects. Relatively quiet if not put it to the full coil. While it works fine, but today is only the first day)