Go to Settings -> About Device -> Build Number. It should look like: full_8227L_demo-...
The is a specific motherboard and firmware revision for a line of Android head units typically sold under generic brand names (like "Podofo," "Xtrons," or "Eonon") on Amazon, AliExpress, and eBay. android yt9216bj-00012-v001
If you have landed on this page, you have likely been staring at a tiny, cryptic sticker on the back of your Chinese Android car stereo. The string isn’t random code; it is the DNA of your head unit. Go to Settings -> About Device -> Build Number