It's a Sigelei Zmax V3... I got it as part of a kit, but the stand-alone price is all over the map.. I'd say about $50
It's still going, I use it every day alongside the ProVari.. But the common issue of the internals shifting (which can eventually lead to performance issues) is already underway.. Not even 3 months old, but also a lot of daily use (obviously less so now since the ProVari arrived on the scene

).. Figure I might as well try to get my money's worth
Some people claim that they can repair theirs, but also sounds like they have to keep opening it up for re-repairs... Doesn't sound like a reliable fix to me..