Multi mixer is a great tool for live sound, home recording, field recording, audio/video and many others. This unit features 4 inputs, channel 1&2: XLR/1/4-inch combo w/-20dB pad, channel 3: Stereo RCA and Stereo 1/8-inch mini (3.5mm), channel 4: Stereo RCA. Each channel has its own volume control. The MM also features numerous outputs, XLR, 1/4-inch, stereo RCA and a stereo headphone output with a volume control. 2AA batteries for about 15 hours or an optional DC power supply (JIB/US4.5-14). Supply +24V phantom power to microphones. Great for adding inputs to an existing mixer by creating a sub-mix of two or more sources before sending the signals to the main mixer or powered speaker. Serving as a sophisticated cable adapter that not only adapts the connector type but also provides the correct impedance with adjustable level control. Serving as the main mixer for solo or duo acts as well as AV presentations. As a mixer for rehearsals when its impractical to set up the entire PA. Interfacing pro audio gear with consumer audio gear. Battery operation allows remote location use where AC power is unavailable. As an emergency back-up mixer to have along just in case.