Created for active musicians and presenters who also manage their own sound, Shure PGX Wireless improves your performance and simplifies your setup. Innovations such as automatic frequency selection and automatic transmitter setup make wireless quicker and completely worry free. PGX systems now feature Shure's patented Audio Reference Companding, delivering the crystal clear sound quality that pro audio engineers trust. The system includes a PG30TQG Microphone, PGX1 Bodypack Receiver and PGX4 Diversity Receiver. Comfortable, reliable headworn system for drummers, disc jockeys, and aerobic instructors.