About 5 weeks ago I got a popup in my AliX account about this $12 "X10" Gueray device
https://www.aliexpress.com/item/4000346000677.html?
As my 3 Ruizu's X02 are dying after 5-6 years I couldn't resist this $12 offer.
It arrived fast, in 10 days.
The problems???
Firmware is not stable, many times it locks and must be restart.
Touch Screen is too sensitive or not.. not all touches are doing what you want.
I was able to play few flac I have.
It has only this encoder knob for selection or volume but to commit you must touch the screen and this isn't working well.
It saw my BT earphones but wasn't able to connect even after 3-4 minutes.
**(
correction, I wasn't activate it correctly. BT does work fine now, after rechecking)
It does have bookmarks for audio files which is important to me as well as speaker and FM (not as good as the X02) radio.
It's metal, heavy, built well and last for more then 10 audio hours, as you must use the screen very often.
Final point? for $12 (shipped) it was a hell of a bargain.
** If you have specific question, ask and I test it on the device.