This pedal is used and in excellent condition.

MU-TRON III+TM translates the envelope or "volume profile" of every musical passage automatically into an easily-controlled, vowel-like sound, as you play. Use the MU-TRON III+TM to create a variety of synthesizer sounds with most electrified instruments: guitar, bass, keyboards, drums, flute, saxophone, brasses -- even microphone. The sharper your attack and the more percussive your instrument, the wilder your sound will be. Besides providing that inverted "snap" (perfect for funky bass), MU-TRON III+TM also functions as an automatic "wah" pedal. You decide how far you want to go.