Ummm, I believe this is not an official Arduino board. Going to Arduino.cc, the only shields I see are:
- Arduino ethernet shield
- Arduino wireless SD shield
- Arduino wireless proto shield
- Arduino motor shield
- Arduino proto shield
There are lots of shields that work with Arduinos, presumably some are good, and some aren't. As I am coming up to speed on Arduino, SainSmart at times seems to leave some things out (like schematics, etc.). As a consequence, it tends to go for low cost boards. If schematics are important to you, consider going to a different manufacturer that does provide these. You may have to pay more for this, but I view it as paying for quality.
When I bought my original Uno kit, it was just a random bunch of parts shipped together with no documentation for the individual parts, and only generic hints on the web site. So now, as I expand, I tend to buy only from sites that have documentation and sketches of the part I'm buying, and skip sites that don't provide this information. I view this as in a tiny way of helping to improve the ecosystem, by buying from quality vendors.