Polyphonic octave electric guitar effect pedal with mini single effect design and true bypass. Full metal shell for durability and exquisite appearance. 3 controlling knobs (Oct1, Oct2, Dry) and 1 mode switch for accurate and sensitive operation: Oct1 adjusts first octave voice volume, Oct2 adjusts second octave voice volume, Dry adjusts dry signal volume. Mode switch offers top (+1 OCT & +2 OCT), both (-1 OCT & +1 OCT), bottom (-1 OCT & -2 OCT) modes. 1/4 inch mono input and output audio jacks. True bypass footswitch with lever to prevent stamping on knobs. Material: Aluminium Alloy. Input Impedance: 470K Ohms, Output Impedance: 100 Ohms, Current Draw: 68 mA. Power supply: 9V DC AC Adapter (not included), use adapter with positive pole outside and negative pole inside. Item Size: 9 * 3.8 * 4.8cm, Item Weight: 151g. Color: As shown. Package includes: 1 * Guitar Effect Pedal, 2 * Adhesive Tape, 1 * User Manual (English Chinese), 1 * Hardcover Box