As far as I know these are special reprap.me drivers.
No schematic no data and from my experience nearly unusable. I was not able to get them going at all, and I am now using cheap ebay sourced stepsticks.
You need to get some information regarding the resistors used to get an idea about the current limits.
Look here for some general information.
To find some cheap stepsticks on ebay use google not ebay search.
You will find some experience for reprap.me stepsticks by searching this forum for reprap.me.