Shure FP25/SM58 Combo Wireless System, H5 Includes FP2 Handheld SM58 Microphone and FP5 Portable Receiver Wireless portability for the freedom to go wherever the job requires Automatic frequency selection that locates an open frequency at the touch of a button & automatic transmitter setup that instantly syncs the transmitter to the receiver frequency Diversity antennas for consistent reception of signal transmission Rugged and reliable Shure construction