Electric guitar preamp effect pedal for guitar players. Features 4 functional knobs (Gain, Volume, Bass, Treble) to adjust the effect performance. True bypass footswitch allows seamless switching between effect and bypass modes. LED indicator shows effect status. Durable full metal shell construction, compact and portable design. Input: 1/4 inch monaural. Output: 1/4 inch monaural. Power supply: DC 9V AC adapter (center negative), adapter not included. Item size: 9.3 x 3.8 x 3.2 cm (3.7 x 1.5 x 1.3 inches). Item weight: 155 g (5.5 oz). Color: orange. Material: zinc aluminum alloy. Package includes: 1 x Guitar effect pedal. Note: Power adapter is not included. Use only a DC 9V adapter with center-negative polarity to ensure proper operation. Additional accessories shown are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowed within +/- 1-3 cm.