Optical wah pedal for electric guitar or bass guitar with adjustable frequency range that provides an array of tone-sculpting options and total optical control for wear-and-tear-free pedal operation without mechanical pots or switches. Its unique spring-back pedal mechanism with resistance adjustment is suitable for any playing style and can be removed. Pedal is equipped with a heel-down Range control that provides free adjustment for low frequency setting (440-250 Hz), additional Fine control that allows for high-end extension of sweep range as high as 2.2 kHz, powerful and tunable volume Boost (up to +15 dB) with on/off switch, and highly versatile Q control that provides precise filter shaping and achieving vocal-like effects. It also features dual LED indicators for Effect On/Off and Boost On/Off, ultra-low noise circuitry and rigged construction that ensures long life. Powered by a 9 V battery or adapter (not included). Dimensions: 254 x 99 x 120 mm. Weight: 460 g.