You can boost the low and/or high frequency of your sound, which can accommodate a combination of other effect units and amps, or any of the other variables you may face when performing.
With a level knob, you can adjust the level of output easily. Depending on the device you have connected, the volume and/or amount of distortion will change.
The effect pedal is a true bypass. When you turn off the pedal, the original sound is perfectly output without any distortion.