Features QUARTET: USB audio interface for MAC or iOS devices. It has 4 analog XLR / TRS inputs with high quality preamplifier. Monitor out supporting up to 3 pairs of studio for direct monitor switch. USB 2, ADAT / SMUX digital inputs, Midi INPUT (USB), 8 analog outputs, multifunction display OLED, master control selector, 6 responsive touch buttons and 3 assignable, compatible with Logic Pro-Final Cut-Pro Tools 9 and 10 -Ableton Live. Includes apogee maestro software.