STR1
I'm not sure how to check the version information for the official firmware.
I bought the machine directly from Losehu, which sells the "Shua Hao" firmware.
If you're using the "losehu" firmware, you can first go to the menu (around item number 20 or so) and set the boot information to text.
As a result, when you power on the device next time, the firmware information will be displayed on the screen for approximately a few seconds before transitioning to the normal control interface.