So I was initially between Solar.jean & Powace08, I sent some final questions to Solar.Jean (because their auction is about $50 cheaper) while I'm waiting to have my questions answered by Solar.Jean I was looking at the photos of the VFD and while both auctions state their VFD are Genuine Huan Yang, it seems as though the VFD from Solar.Jean does not have a variable speed knob but the one from Powace08 does have the variable speed knob. I may be back to ordering from Powace08, unless someone is sure the one from Solar.Jean is original and it will have the variable speed knob when it shows up.