Death by Audio Echo Master Vocal Delay Effect Pedal The pedal comes with integrated XLR input and output jacks, control for Feedback, Mix and Delay Time. There's also a 1/4" FX loop to integrate with virtually any other effect pedal. Powered by an included 9v DC adapter. There's also an optional mic clip to attach the unit to a microphone stand for easy access while singing. We're pretty psyched on this.