"With the classic BOSS BF-2 Flanger, a flanging effect is produced by combining the original signal with an electronically delayed signal. Using four controls, you can tailor a variety of sounds--from dynamic jet-plane effects to short delay, chorus and vibrato sounds." -Boss

Overall this used pedal is in great shape. There are some small corner scuffs and some light scratching. The back sticker is also missing, meaning that it's a little difficult to determine exact year/location of manufacture or serial number. Based on the knobs used and some other factors, we believe this is a Taiwanese BF-2 from 1990-2001. Comes with original box