The Boss BF-3 is a flanging guitar pedal that allows you to combine the original signal with an electronically delayed signal. This Boss effect pedal is foot-activated, making it convenient to use while playing live. The manual, depth, rate, and resonance knobs of this flanging guitar pedal allow you to fine-tune your pedal to get the perfect sound from your guitar. The momentary knob of this Boss effect pedal allows you to turn the flanging on instantly. The Boss BF-3 is ideal for rock and metal musicians searching for the perfect sound.