Considering it's really Android 6.0, I suspect you might have RK3229, which is not that bad, but not good either.
There is a bunch of user feedback I now see across various forums - detailing how deceptive sellers are supposedly selling MXQ Pro AML S905 boxes - and then sending out inferior dirt cheap (MXR) RK3299 devices. We may have to start a name and shame thread for sellers to avoid - just the Website name and seller/store name.