Shure's GLXD24R/BETA58 provides intelligent battery rechargeability, robust RF performance, automatic frequency management and increased channel count with exceptional digital audio clarity and seamless operation. The precision-engineered BETA 87A vocal microphone capsule delivers warm, accurate sound and maximum sound isolation. For use with GLX-D Advanced Frequency Managers (UA846Z2).GLXD4R Wireless ReceiverRack mountable receiver with removable antennas for exceptional audio and rock-solid pe