Includes PGX2/PG58 Handheld Transmitter and PGX4 Diversity Receiver. Rugged, versatile system for everyday use and practice. The Shure PGX4 receiver makes wireless setup a snap. With features like Automatic Frequency Selection and Automatic Transmitter Setup, the PGX4 offers the best in wireless to performers on the go. The Shure PG58 is a rugged microphone tuned to accentuate the clarity of lead and back-up vocals.