Operation confirmed Japanese instruction manual (translated) included The MXR® SLASH OCTAVE FUZZ is a fuzz pedal that creates a powerful sound by adding a vintage fuzz tone one octave up (OCTAVE UP) to the original sound, and combining it with an independent one octave down (SUB OCTAVE). The two octave tones can be adjusted independently. Controls: VOLUME, TONE, FUZZ, SUB OCTAVE, SUB OCTAVE, OCTAVE UP, SUB INTO FUZZ Internal Trims: GAIN, TONE Bypass Switch: True Hardwire (True Bypass) Size: 93mm (W) × 125mm (D) × 55mm (H) Power Supply: 9V battery or 9V AC/DC adapter Manufacturer...MXR Type...Electric Guitar