This USB Hub is powered by a mains adapter supplied. It also is a USB 3.0 cable to connect the device to a computer, laptop, television or similar. What I had noticed first, is the black and very high quality metal case. Plastic parts in vain, perfect for notebook bags, because this part is very robust.
Beautifully thought out are also the single USB hubs, the distance was great enough voted to remove single cable three others pull out without having.
The USB 3.0 capability can confirm I, my two big disks were detected immediately and the data flow rate adjusts. Good is also the backward compatibility to 2.0 for older devices can also be connected.
This HUB is absolutely worth the money and I can recommend it without hesitation!