The BLX Vocal Wireless System from Shure joins world-class design and construction with simple and easy setup and operation, featuring Quick Scan frequency selection and the precision-engineered Beta 58A vocal microphone capsule for optimized for lead vocal performance. Legendary sound and performance, right out of the box. Included: BLX4 Wireless receiver; BLX2/BETA58A handheld transmitter with integrated Beta 58A super cardioid dynamic microphone capsule; microphone clip; padded zipper case.