PreSonus AudioBox iTwo 2-in/2-out USB Audio Interface with 1 Year Free Extended Warranty Bus-powered USB 2.0/iPad audio interface 24-bit resolution; 44.1, 48, 88.2, and 96 kHz sampling rate 2 microphone inputs with low-noise, high-headroom, Class A mic preamplifiers and +48V phantom power 2 switchable line/instrument inputs 2 balanced " TRS main line-level outputs