Features 1、The crunch distortion effect pedal as a classical British rock deformation, has a strong response and support. The control knob makes accurate fine‑tuning easy 2、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 guitar 4、LED can visually indicate the working status of the guitar pedal, powered by DC 9V adapter, very convenient 5、Aluminum alloy casting with fine finished surface and stylish appearance. Equipped with standard 1/4 inch input and output sockets Specification Item Type: Electric Guitar Effect Pedal Model: JDF-3 Input Impedance: 1m Ohms Output Impedance: 1k Ohms Working Current: 10mA Power Supply: DC9V adapter (not included) Size: Approx. 4cm / 1.6in Approx. 9.1cm / 3.6in Approx. 3.2cm / 1.3in Approx. 1.9cm / 0.7in Approx. 1cm / 0.4in Package List 1 x Electric Guitar Effect Pedal 1 x User Manual