M-AUDIO MobilePre USB is the perfect audio interface and preamp for your laptop recording projects. Three kinds of audio inputs and outputs provide maximum flexibility for every application. Record and play music anywhere! 2 high impedance instrument / line inputs (1/4 balanced) 2 analog outputs (1/4 unbalanced) Stereo line output Stereo headphone output with level control knob Gain control knob for each input channel (+40 dB max) Mono / Stereo direct monitoring 16-bit resolution Signal-to-noise ratio - 101dB OS Compatibility - Windows 98SE, ME, 2000, XP; Mac OS 9.1 or OS X