[. . . ] The WD7 is a wah pedal that can be used for any playing style or situation, delivering dramatic improvements in areas that were a problem with wah pedals of the past. A rich array of controls gives you a versatile range of sounds from vintage wah to uniquely fat wah sounds. [. . . ] When using an AC adapter, use only the IBANEZ AC109, AC309 or AC509 adapter to prevent damage. The input jack is used as the power supply switch when running on batteries. The power supply will be switched on when the plug is inserted into the input jack. Either switch off the amplifier or reduce the volume to the minimum level when making the connection to prevent damage to your ears or the amplifier. Turning this clockwise will increase the peak, producing a more intense sound. Adjusts the time delay from when the pedal is returned until the effect switches off in AUTO SW. Turning this clockwise will increase the time delay, preventing the effect from turning off while you are operating the pedal. Turning this counterclockwise will make the effect turn off more quickly, so that it will turn off immediately when you return the pedal. Conventional wah pedals use a Band Pass Filter which cuts the low- and high-frequency ranges. However if you turn LO clockwise, the effect will act as a Low Pass Filter which allows the low-frequency range to remain without being cut, producing a fatter sound. [. . . ] When you return the pedal or take your foot off of it, the effect will turn off after a slight delay. Volume is increased when turned to the right and decreased when turned to the left. [. . . ]