HD Retrovision's specific list of known supported consoles can be found here. Though it may work with others we haven't tested, we cannot guarantee it.
NOTE: This product requires an HD Retrovision Genesis YPbPr Cable. It will not work with a SNES YPbPr cable.
Your television or display must be able to support "240p" video over YPbPr to use this product.
You can easily test for this by following these steps