Features: [ Professional-quality audio interface with USB port [ Fully compliant to USB 1.1 [ Operating under Windows 98SE or newer or Mac OS 9.1 or newer [ Extremely low-noise discrete front end [ Up to 70dB of clean, “musical” gain [ High output signal drive capability [ Fast FET limiter to prevent overload [ XLR and 6.3-mm jack inputs and outputs [ Selectable input impedance [ Phase Invert switch [ High-cut filter switch [ Input and Output level controls [ Precision LED metering [ Built-in low-noise Phantom Power supply [ Compact, stackable all-aluminum chassis