The Rolls MX401 mixes 4 microphones or line level XLRs into two balanced Stereo outputs. The four XLR inputs, each have individually switchable phantom power, MIC or LINE level switch, Level control, and a Pan control. It features two independant balanced, XLR outputs both with selectable MIC or LINE level. A 1/8" inch Stereo Aux/Headphone output has been provided along with a Clip indicator, Power indicator, and Power switch. The unit is also powered by two 9-Volt alkaline batteries or the included 15VDC power supply. The MX401 replaces the previous MX124.