Like I guessed 
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Auto #1 option translate to 00
Normal #2 option translate to 01
1.200V #3 option translate to 02
1.250V #4 option translate to 03
1.350V #5 option translate to 04
1.400V #6 option translate to 05
The input is numeric have min 0x0 and max 65535, but default is 0 which is auto even tho there is crazy amount of possible inputs here from 0x0 to 65535 the bit here correspond to the order of the option which in it’s turn means auto, normal, 1.2…etc
I will show off screenshots