Typically runs Android 8.1, though some newer builds may report Android 10.0 (often spoofed or via specific kernel updates).
Do not update if your unit is functioning perfectly. Using the wrong firmware file can "brick" the device, making it unusable. sp9853i 1h10 vmm firmware update
Depending on your specific manufacturer, you can update via two primary methods: If your head unit supports Over-the-Air updates: How To Update Your Android Head Unit + Apps Typically runs Android 8