For sale is a vintage Boss BF-2 Flanger, black label with silver thumb screw. The pedal was made in Japan December of 1980. The unit sounds great and is fully functional. It works with a 9 volt battery or a power supply, neither are included. The early black label units are one of the best sounding Flangers ever made. The unit has typical marks and dings for a effects pedal of its age. It is all original except for two mounting screws on the bottom of the unit.