This pedal extracts only the down-tuning function from DigiTech's Whammy DT. It can lower the pitch by up to 7 semitones or one octave. When tuning down an octave, you can choose whether to include the original pitch or not. The toggle switch on the upper right allows you to select momentary operation. It is fully functional with no scratchiness or contact issues. The unit only, no other accessories.