I bought two of what seem to be the same model

https://www.amazon.com/TIMMKOO-Touchscreen-Portable-Lossless-Recorder/dp/B07XFZYDB8/ref=asc_df_B07XFZYDB8/?tag=hyprod-20&linkCode=df0&hvadid=385577198584&hvpos=&hvnetw=g&hvrand=18032904359157758560&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1019943&hvtargid=pla-829045088073&psc=1&tag=&ref=&adgrpid=79288770955&hvpone=&hvptwo=&hvadid=385577198584&hvpos=&hvnetw=g&hvrand=18032904359157758560&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1019943&hvtargid=pla-829045088073

Let me know what you find I was just considering if something like RockBox could be ported to something like these.