3 Effects Knobs and 1 Switch are accurate and high sensitive. The Range of Detune Mode is: -25/-20/-15/-10/-5/0/+5/+10/+15/+20/+25 cents. Up: Outputs a precise polyphonic pitch shifting voice. Detune: It slightly shifts the pitch and mixes it back with the original signal to create a chorus-like effect, it rings a lot of nice space feeling. Down: It shifts the pitch and mixes it back with the original signal to create a rich harmonic voice. Product Description Harmonizer-Pitch Original signal to create, precise polyphonic pitch shifting with 44.1k 24bit sampling, 32 bit true floating point DSP, with storage of timbre sound pedal ±2 Oct Pitch Range (16 optional parameters) Input: 1/4 inch monaural jack (impedance: 470k Ohms) Output: 1/4 inch monaural jack (impedance: 100 Ohms) Power Supply: 9V DC adapter(center minus plug) Current Draw: 128 mA Dimensions: 95mm (D) x 45mm (W) x 53mm (H) Weight: 278g(with box) Colour:As Shown Material:Plastic + Metal [Note] please note this pedal can not powered by batteries. Need a 9V DC power supply with negative in the center to power up. Package Contents: 1 x Harmonizer Pedal Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.