This is a very cheap handheld sold on AliExpress and now there's a community that has been improving it, as well as Data Frog themselves with a firmware upgrade.
To change various things including removing the stupid background music/sound effects and "Welcome" image: https://github.com/vonmillhausen/sf2000
Here's the latest firmware update which is 1.71v and that fixes the slowdowns that occurred when playing SNES and GBA games:
I've personally made the changes I wanted and am very satisfied with it. That said, I am looking forward to that CFW that's mentioned on GitHub as this device seems to have more potential.
To change various things including removing the stupid background music/sound effects and "Welcome" image: https://github.com/vonmillhausen/sf2000
Here's the latest firmware update which is 1.71v and that fixes the slowdowns that occurred when playing SNES and GBA games:
I've personally made the changes I wanted and am very satisfied with it. That said, I am looking forward to that CFW that's mentioned on GitHub as this device seems to have more potential.