AMT WH-1 is an optical version of a classic "WAH-WAH" effect with bandpass filter range selection (3-way switch). Optical frequency control increases the service life of the effect eliminating frequent replacements of maintenance and replacement of the control potentiometer. AMT WH-1 features low noise and expanded frequency tuning range due to the use of original JFET-based circuit design. AMT WH-1 boasts great versatile sound and processes both clean guitar sound and Ultra high gain overdrive equally well. AMT WH-1 features: 100% analog WAH-WAH effect; Fixed switching among bandpass filter ranges: 0.2-1kHz, 0.3-1,5 kHz, 0.4-2kHz; True bypass; Fixed effect selection by pressing the movable front end part of the pedal; Removable support feet (the option is useful when you install the AMT WH-1 on the pedal board); Effect monitoring by using blue LEDs on both pedal sides (visible engaged AMT WH-1 mode); AMT WH-1’s steel heavy body is stable and confidently responds to foot control; Adjustable pedal movement by means of an axial screw; Powered by DC adapter or 9-12V 9V battery; Low power consumption; Small size: 110 x 62 x 58 mm (fits easily into your guitar case); Weight (without battery) 0.45 kg.