This wireless in-ear monitoring system is clear, dependable, and simple to set up. With one-touch frequency scan and IR sync, the PSM 300 quickly finds and assigns a clean wireless channel all on its own. MixMode technology lets each performer create their own personal mix from their bodypacks by blending two channels to taste and dialing in custom EQ and limiting. And since this Shure PSM 300 bundle includes all you need for the show — the P3T transmitter, two P3RA bodypack receivers, two sets of SE215 earphones, plus batteries, accessories, and even a rackmount kit — you and your partner are ready for the best monitoring experience you've ever had, right out of the box.