The P3TR112GR is part of the Shure PSM 300 wireless systems family. The Shure PSM 300 Stereo Personal Monitor Systems deliver reliable wireless freedom to every corner of the stage. Patented Audio Reference Companding ensures the clearest sound, with ultra-low noise and no artifacts. 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.