The Boss BF-3 Flanger pedal is an updated version of the classic Boss flanger for guitar and bass, with thick stereo sounds. There are two new modes - Ultra and Gate/Pan- for stereo flanging with depth and whatr Boss call “futuristic slicer-type sounds”. The Momentary mode turns flanging on instantly and tap tempo is adjustable via the pedal. The BF-3 has independent Guitar and Bass inputs and stereo outputs.