Everything you need to know about Beeper & error beeps with your Ninebot Mini...
SOURCE FCC ID/ source ninebot france
"Your Mini Pro beeps errors?
In order to understand their meanings, we must first count them.
Attention: the mini can emit long beeps followed by short beeps.
You will have to count the number of long beeps (which indicates the number of the tens) and the number of short beeps (which indicates the number of the units).
9 short beeps indicate a problem "3", which means a CPU error.
3 long beeps followed by 4 short beeps indicate a "34" problem, which means a firmware update error.