MOOER Pure Octave – LEKATO-Best Music Gears And Pro Audio
Mooer Polyphonic Pure Octave Effect Pedal w/ Power Supply : Musical Instruments - Amazon.com
Amazon.com: MOOER Tender Octaver Pro, Stereo Octave Pedal with Adjustable between unison and +1/-1 octave Make Your Harmonization, Pitch Shifting, Whammy and Detune Chorus Effects : Musical Instruments