AMT WH-1 Wah Wah, Effect Pedal, Wah Wah, Wear-free electro-optical circuit, Three switchable filter frequency ranges, True bypass, Power supply via 9V battery or 9V DC power supply (coaxial connection - minus on the inside, not included, matching power supply available under Article Nr #409939#), Dimensions: 110 x 62 x 58 mm, Weight: 450 g, Made in Russia