Rolls MX124 Portable 4 Channel Stereo Mixer Mixes four microphones to stereo XLR outputs Output level controls for mic or line-level output Transformer isolated outputs - Battery and AC powered Phantom Power and Low-Cut switches for each Mic input 1/4 inch and 1/8 inch TRS stereo Phone/Aux Outputs - Switchable Low Cut filter (100 Hz high pass) for each channel