Im not sure. Im itching to buy this miner myself, but dont trust those resellers. Too many bad experiences from other users. Not being able to find anything out about the manufacturer also scares me off.
As far as I've read the "trusted vendor" on asicminervalue is not worth much.
I just noticed that I linked the wrong site when I talked about a "trusted vendor"; was actually talking about
https://asicminermarket.com/ is legit, have ordered from them few times.
The Zig Z1 is also legit, I have it from asicminermarket. But it broke down after 2 days, now I am trying to find support.
Edit: If anyone has Zig, please chime in. I need the working USB image to fix mine I think. Thanks.