Used Donner Harmonic Square Effect Pedal

The used Donner Harmonic Square Effect Pedal is in great condition and delivers rich pitch-shifting capabilities with 7 different modes, including octave, pitch up/down, and detune. Its compact aluminum alloy body ensures durability, while true bypass provides transparent tone. Powered by a standard 9V DC adapter (not included), it features responsive controls for wet/dry mix, pitch, and mode selection, making it perfect for guitarists seeking versatile and creative tonal options in a pedalboard-friendly size.