TC-Helicon Perform V Essential set of classic vocal effects, including 3 Reverb, 3 Echo, and 3 Double types Smartphone integration. "Beam" additional vocal effects, including harmonies, Hard Tune, and megaphone, via free app for iOS/Android Powerful Anti-Feedback function. Compatible with the TC-Helicon MP-75 & MP-76 Modern Performance Vocal Microphones with Mic ControlTM to control effects from your mic Visual Pitch meter. Helps improve vocal technique and train the ear Dimmable buttons allow adjustment for a variety of lighting conditions.