The top wing switch when on is for the neck pickup then you use the 2 rollers next to the switch to control the tone and volume while the switch is on. When the upper switch is off the bottom wing 3 switches are on/off switches. 1 for the neck pickup, 1 for the bridge pickup and 1 is a low end fliter. When the the top wing switch is off you use the normal tone and volume knobs. I hope I didn't confuse you.