The unique serial number of Beierplasm pen k85 machine
Each Beierplasm pen k85 passes the qualification test before it has a unique serial number.
It was very convenient for customer management.
All Beierplasm pen machines have a unique serial number.
When you hold down the power button and the frequency button at the same time.
Keeping it for 6 seconds at the same time.
The serial number interface can appear.
This number is the only serial number of Beierplasm pen.
Please write down this number. And save it.
This is very convenient for the most after-sales tracking.
For the warranty,