PSM 300 Stereo Personal Monitor Systems The PSM 300 Stereo Personal Monitor System delivers detailed 24-bit digital audio processing and reliable wireless freedom to every corner of the stage. Patented Audio Reference Companding ensures the clearest sound, with ultra-low noise and no artifacts. Dependable wireless coverage extends over 300 ft (90 m) of range and eliminates dropouts. Easy to setup and operate, PSM 300 systems offer one-touch frequency scan and sync to find and assign a clean wireless channel. Adjust the volume and use MixMode technology or stereo mode to create a personal mix from two channels of audio. PSM 300 System, Professional Bodypack, With SE215CL Sound Isolating™ Earphones