There are two methods to set the speed of counting segment B

Method 1:

1. Long press the settings button for 0.8 seconds to enter the function menu

2. Short press the settings button to find the "b - --" B segment voltage setting

3. Press the "+/-" key to set the voltage of segment B

Method 2:

1. During operation, when one horizontal bar is displayed, press the "+/-" key to set the voltage of segment A

2. During operation, when 2 horizontal bars are displayed, press the "+/-" key to set the voltage of segment B