A: IN Jack
1/4" (6.35mm) mono audio jack for connecting instruments or other pedals
B: 9V DC jack
Power supply uses 9V DC 500mA (center negative).
C:OUT Jack
1/4" (6.35mm) mono audio jack for connecting with amplifier.
D: LEVEL Slider
Control output level of ±15dB
E: 31.25, 62.5, 125, 250, 500, 1K, 2K, 4K, 8K, 16K
F: ON/OFF foot switch.