This is a vintage 1975 Ibanez Flanger “FL-305” electric guitar effects pedal. This particular example is in very nice all original condition and works perfectly. The FL-305 flanger is capable of “flanging” a broad frequency spectrum, or the user can choose to narrow the affected frequencies, allowing for a multitude of usable sounds. The user can also choose to delay the flange with sweep-able regeneration and delay time controls. From flanging, chorus, and tremolo effects, this pedal is extremely versatile and is a great addition to any guitar players pedal board.