If you only need to operate one button at a time ...
Button Volts
B1 1.0
B2 1.5
B3 2.0
B4 2.5
B5 3.0
B6 3.5
B7 4.0
B8 4.5
If you only need to operate one button at a time ...
Button Volts
B1 1.0
B2 1.5
B3 2.0
B4 2.5
B5 3.0
B6 3.5
B7 4.0
B8 4.5