I wonder if anybody ever tried the Datexx DS-883 graphing calculator?

http://www.datexx.com/product-p/ds-883.htm
http://calculatorsreview.blog.com/datexx-ds-883-889-function-graphing-scientific-calculator/

It supposedly has 889 functions, as well as programming support. However, I didn't find the technical specs yet and the screen resolution seems very small. I wonder if it's an alternate model or just one of those Casio FX-7400G knockoffs? Considering the $60 price when an FX-9750GII costs the same, I would at least hope for better specs.