The E-4 Voice Tweaker is an outrageously jammable box of fun that harmonizes, auto-pitches, vocodes, loops, and glitches your voice and anything else you feed it. Flip through hands-on controls to manipulate the sound, and chain in AIRA Compacts and other electronic instruments and let them ride in perfect sync. Vocal performance tool with powerful voice transformer effects Instantly shape the sound with pitch and formant sliders Advanced vocal effects including Auto Pitch, harmony, and vocoder Dial up unique rhythmic effects with the Scatter knob Process the sound output with high-quality reverb, echo, tempo delay, and chorus effects Low-cut filter and noise gate to eliminate unwanted sounds 24-second looper with unlimited overdubbing, undo/redo, and automatic BPM detection Supports external MIDI control of pitch, harmony, and vocoder functions ¼-inch mic input with wide-ranging gain control Headphones output with support for an inline mic Comprehensive connectivity with audio, MIDI, and sync I/O plus AIRA Link Class-compliant USB-C audio/MIDI interface—no drivers needed Lithium-ion battery with up to 3.5 hours of operation per charge Sturdy construction and robust controls Connect to other AIRA Compacts and standard MIDI devices with optional BOSS TRS MIDI cables