It's a 3-mode (H-M-L) driver. I put it in a single 18650 host with an XM-L T6 LED and it's drawing 3.20A on high, 1.00A on medium, and 0.33A on low at the tailcap.
Upon closer inspection it seems that the two drivers are quite a bit different. This photo is from the KD website. I rotated it so that it would be easier to compare the locations of the components.
Thanks kosPap. I asked one of the merchants selling this on eBay for more info (how many modes, current, etc.) but they didn't get back to me. Did you buy one of these?