As you can see, Harmonic Square have a novel design logo, classic mini size, convenient and durable. True bypass switch lets your instrument’s signal pass through a non-electronic bypass line when the effect is disengaged, feeding your amp with direct, unaltered signal from your instrument. There are two function knobs, namely WET and DRY. 3 way toggle switch select between different modes. 7-Mode octave effects you can choose. Control two function knobs and choose different model you want to made you own music tone. Enjoy your own fun and colorful life. This is a wonderful pedal. Digital circuit design, and variety of octave effect adds musical color to you tone. 7 different modes: ±2 semitones, ±3 semitones, ±4 semitones, ±5 semitones, ±7 semitones, ±12 semitones, ±24 semitones, LED indicator shows the working state

Model: EC966