Dual Boot Installer for Dingux. It lets you choose if you want to boot on the official firmware install on the Dingoo on on Dingux from your miniSD card.
I went to auction at a mom/pops video game store few months ago that was closing, and bought 11 slims for $200, 1 was DOA but 10 work fine. so hella deal. Already rgh3'ed 8 of them. But most younger kids don't even want anymore, unless it plays stupid "fortnight", or newer shit.