LR Baggs Venue DI Acoustic Guitar Effect Pedal Adjustable Gain for Both Passive and Active Pickups 5 Band EQ with Tuneable Low-Mid and High-Mid Bands Garret Null Notch Filter for Effective Feedback Control Phase Inversion for Best Sound and Feedback Control.Full Chromatic Tuner with Footswitch Mute/Tune Function Works with 9V battery or DC adapter