Features 1、Compact size octave guitar effect pedal with full metal shell, lightweight and durable. 2、1 OCT DOWN /u0026 2 OCT DOWN for adjusting the level of the synthesized signal which one or two octave lower. 3、UPR. OCTAVE for adjusting the level of the synthesized signal which one octave higher. Specifications: Features: Compact size octave guitar effect pedal with full metal shell, lightweight and durable. 1 OCT DOWN & 2 OCT DOWN for adjusting the level of the synthesized signal which one or two octave lower. UPR. OCTAVE for adjusting the level of the synthesized signal which one octave higher. NORMAL knob for adjusting the level of the dry signal. True bypass footswitch for switching effects and bypass. LED light for indicating effects or bypass status. Specifications: Material: Metal Signal Input: 1/4″Monaural Jack (impedance: 500k Ohms) Signal Output: 1/4″Monaural Jack (impedance: 100K Ohms) Power Supply: DC 9V adapter (positive outside and negative inside)(not included) Working Current: 30mA Item Size: 3.5 * 9 * 3.5cm / 1.4 * 3.5 * 1.4in Item Weight: 145g / 5.1oz Note: The power adapter is not included. Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * Pouch 1 * User Manual(English & Chinese) Package List 1 * Effect Pedal 1 * Pouch 1 * User Manual(English & Chinese)