Professional USB audio interface for connecting to Mac and Ios devices. Features 2 combo XLR / Line inputs, 2 1/4 TRS outputs and a headphone output. It enables extension of expenses with Breakout Box (sold separately), giving us extra 2 XLR outputs. High quality AD / DA conversion based on ESS Sabre32 chipset of Apogee yielding a wide frequency range of dynamic areas and extremely low noise levels. Oled color display with graphical display of functions and two anathesima touch knobs. In the central panel is the classic round dial by which regulate the main output level and the inputs-outputs of the card. The microphone preamplifier is designed to deliver uniform sound effect on natural instruments and voice recordings ranging 0-75dB. Works with all the core audio introduced for Ios while charging the IPad / iPhone during the course of operation. It includes software Maestro where we can intervene in individual detail the interface settings such as voltage levels, phantom power for condenser microphones, select and assign I / O etc. Midi-USB also has to connect keyboard and DJ controllers. The packaging except the Duet is the cable with Ios devices (Lightning port), USB cable for connection to Mac, power adapter and breakout cable to the IN / OUT.