Here’s a video that goes over everything you’d need to know about updating the firmware on your RetroTINK products. It’s a REALLY easy process, but I thought a quick runthrough showing all the models compatible with USB updating might be a help to some people. After you do it once though, it’s super quick to repeat!
Drivers (install first): https://www.ftdichip.com/Drivers/CDM/CDM21228_Setup.zip
RetroTINK Update Software: https://www.dropbox.com/s/7nr70y6mbx9yzp6/RetroTINK%20FW%20Tool.zip?dl=0
RetroTINK 2x Products: https://www.retrorgb.com/retrotink2x.html
RetroTINK 5x Info: https://www.retrorgb.com/the-retrotink-5x-has-arrived.html