8BitDo is now selling a Bluetooth receiver for the Sega Saturn for $25. They're claiming "Virtually Lag Free", but as usual they don't post any actual measurements. If you're willing to spend an extra $10, you can get one based off of BlueRetro that's been measured with low-latency BT controllers
Had no idea they had receivers that can be used on retro consoles. That’s dope if they work well.