1EASY CONTROL: The B box preamp pedal has 4 control knobs for gain, treble, bass and volume, which can be adjusted flexibly, useful and practical, very convenient 2COMPACT AND PORTABLE: The effect pedal mini style design is both durable and lightweight, with a refined aluminum chassis that looks great on any pedal 3MAIN FUNCTIONS: The preamp effect single pedal can help to adjust the overdrive volume, medium high frequency, low frequency volume and the output volume of the pedal 4PRACTICAL SWITCH: The B box preamp effect single pedal has a true bypass switch, fully analog signal path, realize turn on or turn off the LED indicator 5APPLICABLE SCENARIO: Use this small, lightweight electric guitar B box preamp pedal to carry around, perfect for stage or outdoor performances 1 xB Box Preamp Pedal 1 x User Manual