The MXR Poly Blue Octave combines modern and classic pitch-shifting styles with fuzz and modulation, making it the ultimate octave pedal for sound tinkerers and tone seekers Controls: Dry, SUB-1, SUB-2, Mod, Oct+1, Oct+2 Push buttons: Fuzz, Mono LED: Effect On Foot switch: Effect bypass Input and output: 6.3 mm jack Mains adapter connection: Hollow female plug 5.5 x 2.1 mm, negative pole inside Power consumption: 265 mA Power supply with a 9 V battery or a 9 V DC mains adapter (not included in delivery), suitable mains adapter: art. 409939