I have an anbernic rg35xx h - it's a great device; totally recommend it. It plays games up to ps1 with easy, it also works good in most psp games, maybe with a little frameskip on more resource intensive games.
Very good controllers and firm design. Great value for its price!
I have an Anbernic RG35xx too - another cool thing alongside the emulators is that it runs Pico-8, which is pretty cool on a little physical gameboy-esque device.
Very good controllers and firm design. Great value for its price!