Retro Game Handhelds

Hi there. I bought a RS-97 V2. But on the motherboard there is written RG-PLUS V1.3. What custom firmware should I use? Thank you.

Perdón para quienes la tengan vale la pena la powkiddy Q90? Muchas gracias

when i open dos it loads dosbox then a program loads where you have a menu that you can add your dos games to by locating the exe file on your device but its a pain to have to do this for all dos game i have on the sd card also its a pain when some games need the sound setup for the game so i also have to add the setup exe to the list anybody know if its possible someway to load games like the other emulators do where it will open the folder where the games are for that system and you can choose a game and it will open in the emulator?