I'm waiting for a follow up answer on the DOT approval, but Jason Zou via AliExpress, but I did get some pictures from him showing that it does have a ratcheting chin strap (exactly the same as that on the AFX FX-39DS) and also a pump to inflate/deflate the cheek pads. I don't see the open/close switch for the front mouth/intake vents not that those do anything without a chin curtain in place.
I'll probably order one up as soon as I get a confirmation on the DOT sticker. I wish they came in better color/graphic options. I've already got 2 matte black DS helmets.