Nady MM-15USB Compact USB Mixer 2 Mono channels with balanced Mic and Line Inputs and 2 Stereo Channels with Line and RCA Inputs; each channel has Trim, 3-Band EQ, Aux Send, Pan, and Level Controls with Peak indicator LED's USB 1.0 I/O Interface plus Digital Optical Inputs and Digital Coaxial Outputs to send or receive digital audio signals to or from any computer Stereo Mini Jack iPod/MP3 inputs Separate Main Mix, Control Room and Headphone Outputs; Stereo Aux. Return Inputs with Level Control; Tape In/ Out RCA co 2 mono channels with balanced mic and line Inputs and 2 stereo channels with line and RCA inputs Trim, 3-band EQ, Aux Send, Pan, and Level controls with peak indicator LEDs on each channel, plus many more features The Nady MM-15USB is a compact USB mixer with up to 15 simultaneous inputs and 10 outputs (including a complete USB interface) This versatile Nady desktop mini-mixer is a valuable tool for almost any studio recording, computer, home audio, or live performance application