ZOOM V6-SP VOICE MULTIEFFECTS is a multi-effect voice processor in pedal board format. Technical features include, 10 studio-quality effects, 3 Voice, Harmony and Effect vocal processors, XLR microphone input, Formant Shift pedal to adjust the Voice character in real time, Looper to record up to 3:30 min, 40 pre-configured patches created by professional singers and audio engineers, 100 memory locations for storing user-created patches, built-in compressor for optimizing input signal levels, integrated enhancer for optimizing input signal frequencies through equalization and de-essing. It also has a USB 2.0 audio interface capable of recording up to 16/24/32-bit, 44.1 kHz, USB port, headphone output with dedicated volume control. It runs for 3.5 hours with four AA batteries or with the included AC adapter. The optional expression pedal offers advanced control over effect parameters