The M2R belt pack receiver is part of the M2 system. Rugged, ergonomic compensate housing includes a field-replaceable flexible-whip antennas. The stereo monitor system offers Personal Mix Control, which gives each musician volume and mix control of two independent signals on stage, via easy-to-use controls on the M2R stereo body-pack receiver. Any number of M2R stereo receivers may be used on the same frequency with a single M2T stereo transmitter. On board limiter (defeatable) helps protect your hearing from sudden peaks. Includes Audio-Technica earphones with proprietary dynamic drivers offer full frequency response and outstanding isolation with 3 sizes of rubber eartips plus an ear-conforming foam tip. Also, an auxiliary input offers a connection point for an ambient microphone, click track, or other mic- or line-level input. These rugged systems are built to stand up to the inevitable bumps of life on the road, delivering clear, natural sound for touring and installed-sound uses.