ALESIS IO|2 Express, Two-channel computer audio recording interface, Record up to 24-bit, 48 kHz audio into virtually any software, Monitor sessions with balanced studio monitor and headphone outputs, High-quality A/D and D/A converters, discrete-design preamps, 48V phantom power, Inputs for microphones, line-level sources, and instruments including guitars, Tricolor stereo level meter and lighted status indicators for visual monitoring, MIDI Input and Output jacks for playing and controlling software with instruments, USB bus powered - no external power supply needed, Incl. USB cable and Software CD, Windows and MAC OS X