Rolls MX122 MiniMix Pro Mic/Source Mixer 1 XLR Mic Input with rear panel Trim control, balanced 4 individual 1/4" Stereo Inputs;Balanced 1/4" TRS Outputs. Balance control on each channel (Pan on the Mic channel). Headphone / Auxiliary Outputs;+12VDC Phantom Power. External Power Supply included for low noise operation.