Features: Acoustic guitar simulation effect pedal. Supports 3 modes: Piezo, Standard, Jumbo. With volume, resonance of guitar body, overall brilliance and harmonics adjusting knobs. True bypass footswitch for switching effects and bypass. LED light for indicating the working status. Full metal shell, durable and sturdy. Effects Explanation: Piezo--Simulates the sound from a piezo pickup installed on an electric-acoustic guitar; Standard--Simulates a normal acoustic guitar sound; Jumbo--Simulates a bigger body acoustic guitar with more low end and resonance. Specifications: Material: Metal Working Modes: Piezo/ Standard/ Jumbo Signal Input: 1/4Monaural Jack (impedance: 1M Ohms) Signal Output: 1/4Monaural Jack (impedance: 100 Ohms) Power Supply: DC 9V adapter (center minus plug) Working Current: 17mA Item Size: 3.5 * 9 * 3cm / 1.4 * 3.5 * 1.2in Item Weight: 152g / 5.4oz 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 * User Manual(English & Chinese)