It is possible to create 3 separate sounds.octave lower,2 octaves lower with 1 octave higher.and 1 adjustable embellishment. so that with only 1 quitar,3 octaves can be plaved and each tone has a separate volume control. True Bypass switching Design Full metal case, sturdy and , rust-proof and colorfast. Compact miniature shape, highly concentrated functions, compact and portable, full-featured, no loss of sound quality. Input impedance:340KΩ Output impedance:290Ω Working Voltage:DC9V(center minus) Rated current consumption:10mA Colour:Blue Material:Metal Package Contents: 1 x Effector 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.