Probably you mean this https://enertionraptor.shop/products/focbox-unity-dual-motor-controller There are threads about that is not really good shop 
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this funny how that website has a unity+vx1 bundle that cost more than buying the unity and vx1 individually
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he rebranded the remote
Now isn’t that just straight up illegal? Well… it might be fine cuz it seems like he just changed the title…
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It’s Potter
Confirmed on multiple threads
We know potter has some affiliation with the enertion raptor shop. It’s allegedly a Chinese factory wholesaling them.
I’ve purchased several and they all bench tested fine. Three I know of from there are all running fine.
Capabilities, reliability and availability- the vesc market is beyond dominated by the $200 unity now available.
If you can hold out for the TBvesc 6 that’s likely going to be a nice piece. But no ones gonna beat the price for a dual vesc until the unities are gone.