Features V6 offers over 10 studio-grade effects Simultaneously use up to three vocal processors from the Voice, Harmony and Effect sections Formant Shift pedal for adjusting your vocal character in real time Looper for recording up to 3:30. 40 preset patches created by professional vocalists and audio engineers 100 memory locations for storing user-created patches Built-in compressor for optimizing input signal levels Built-in Enhancer for optimizing input signal frequencies via equalization and de-essing USB 2.0 audio interface capable of recording up to 16/24/32-bit, 44.1 kHz USB port for firmware updates, power and audio recording Line output for connecting to external mixing consoles Headphone output with dedicated volume control Runs for 3.5 hours on four AA batteries Included AC adapter Optional expression pedal offers advanced control over effects parameters