When I read the specifications, I was over the moon: 1000 Mbit Ethernet, USB 3.0 very quickly so. The day of awakening. Unwrapped, connected to the MacBook Air, did not happen .... Not even a LED lights, nothing. Later in the guide Gelsenkirchen which one drivers must install such a crap. From because Plug & Play. So all bagged again and sent back. This device can recommend anyone. Rather buy the original from Apple, then it'll work well. Never again Digitus. That was already the second time that I will be disappointed by the brand.