Mooer Purer Octave Pedal; polyphonic octave effect pedal; precise polyphonic octave without distortion; 15 different octave modes and a DT (Detune) effect; true bypass, controls for Octave Mode; Sub and Upper; mini switch for Panel/Fav A/Fav B; bypass footswitch; status LED; metal housing; 6.3 mm mono jack input / output; power supply via optional 9V DC power supply 2.1 mm x 5.5 mm hollow plug; matching optional power supply: Art. No. #409939; polarity (-) inside; current consumption 120 mA; dimensions (L x W x H) 93.5 x 42 x 52 mm; Note: Battery operation is not supported