The BOSS BF-2 flanger pedal, capable of producing a wide variety of sounds. Purchased about 30 years ago and stored at home for a while. Operation has not been confirmed. - Model: BF-2 - Type: Flanger - Color: Purple - Battery Type: 9V battery - Output Terminals: 1/4 inch jack - Input Terminals: 1/4 inch jack We look forward to your purchase if you understand the above. No smokers or pets.