#1
2 emg active pickups, no tone control, 2 or 1 volume /
no pickup selector/
does that mean it uses 2 pickups at a time//
is it necessary to use 2 volume knobs or 1 is enough//

my shift button isnt working, so slash means question mark, thx
#2
I'm guessing you have one volume control per pickup, so to use neck only, you turn the bridge way back down, and vice versa.