Electric guitar distortion effect pedal for guitar players. With 3 functional knobs(Tone/Level/Gain) for adjust the performance of the distortion effect. True bypass footswitch for switching between distortion effect and bypass status. LED light for indicating effects or bypass status. Full metal shell and compact size, and portable. Name: Model Number: -m Type:Effects Color: gold Functional Knobs: Level knob: adjust the level of overall output Tone knob: adjust the tone color of the distortion sound Gain knob: adjust the gain of the distortion sound Input: 1/4 inch monaural Jack Output: 1/4 inch monaural Jack Power Supply: DC 9V AC adapter (center minus plug)(not included) Item Size: 9.3 * 3.8 * 3.2cm / 3.7 * 1.5 * 1.3in Item Weight: 150g / 5.3oz/pcs Note: 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 Contents: 2 * Effect Pedal. 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.