Feature:1. The crunch distortion effect pedal as a classical British rock deformation, has a strong response and support. The control knob makes accurate finetuning easy2. Three knobs are separately used to adjust the distortion(gain knob), adjust the volume of sound(volumn knob) , and adjust the strength of the tone(tone knob)3. Come with True Bypass designs, which will minimize tone loss to realize the original sound of your guitar4. LED can visually indicate the working status of the guitar pedal, powered by DC 9V adapter, very convenient5. Aluminum alloy casting with fine finished surface and stylish appearance. Equipped with standard 1/4 inch input and output socketsSpecification:Item Type: Electric Guitar Effect PedalModel: JDF-3Input Impedance: 1m OhmsOutput Impedance: 1k OhmsWorking Current: 10mAPower Supply: DC9V adapter (not included)Size: Approx. 4cm / 1.6inApprox. 9.1cm / 3.6inApprox. 3.2cm / 1.3inApprox. 1.9cm / 0.7inApprox. 1cm / 0.4in.Package List:1 x Electric Guitar Effect Pedal1 x User ManualNote:Please allow 1‑2mm error due to manual measurement. Thanks for your understanding.