The ART USB Mix Three Channel Microphone, Instrument, and Line Mixer / Computer Interface is a compact versatile audio interface for your computer that converts analog signals from a variety of audio sources to USB Audio. The USB Mix provides a great starting point for personal home studio recording or for anyone wanting to do mobile location recording. Features: • USB powered, no external power supply needed when used with a computer • Balanced XLR or unbalanced ¼-inch Instrument inputs with switchable impedance • Switchable low noise +48V phantom power • Balanced ¼-inch TRS inputs for stereo or mono line-level sources • ¼-inch TRS output jacks work with balanced or unbalanced lines • Stereo ¼-inch TRS headphone jack with independent level control for output monitoring • Independent controls for both sets of inputs, main output, and headphone monitor • Green/Red LED signal/clip indicator • Switchable assignment of USB playback to channels 2 and 3 • USB 2.0 compliant • USB cable, AC adapter, and Audacity recording software included