Rkpx3 Android Update Link
It is highly likely that "Rkpx3" refers to the Rockchip RK3066 processor, a dual-core chip popular in older Android TV boxes, car head units, and tablets (roughly 2012–2015 era).
Because these are aftermarket units, there is no single "official" Android website for updates. You should contact the manufacturer or check specialized forums: Phoenix Automotive Rkpx3 Android Update
Many custom Rkpx3 Android builds allow dual-boot with Linux (EmuELEC) via a second SD card. You get the best of both worlds: Android for Android games and streaming, Linux for low-latency retro emulation. It is highly likely that "Rkpx3" refers to
Select . If a new version is available, tap Download and follow the prompts. Option 2: Manual Update (USB/SD Card) car head units