If you don't know what binary is, you are about to get a crash course. Binary follows a simple rule, the number is doubled each time.
1 2 4 8 16 32 64 (and so on)
This is the way the numbers work on the face of the gyro.
so if A and B are lit (1+2=3), your first digit is 3.
Then if I, J, & K are lit, (2+4+8), then your second digit is 14.
So we are up to 3.14.
Then, if during those 3 seconds you push the setup button, it will show you the final number in the firmware.
Just checked, you should have A and B lit, then you should have H lit, meaning you are on version 3.1. If you push the button, I don't think any lights will turn on, meaning you are on 3.1.0
I hope this makes sense. Binary is fun, just takes a minute to wrap your head around it.