The master volume knob (1), the 3 way pickup selector (2)
and the master tone knob (8) are regular in most electric guitars.
The preamp switch (3a) activates a preamp (powered by
a 9v battery) that creates a big amount of gain for those extra-saturated
leads!
The varitone knob (4) is a 6 position rotary knob that
changes the volume and tone of the guitar when you rotate it.
There's also a regular phase switch (5) and finally there
are the neck (6) and bridge (7) dual sound switches that allows you to
switch between single
coil / humbucker modes the neck and bridge pickups.