The BLX Vocal Wireless System from Shure joins world-class design and construction with simple and easy setup and operation, featuring QuickScan frequency selection and the trusted PG58 professional quality vocal microphone capsule for lead and backup vocal performance applications. Legendary sound and performance, right out of the box. Included: BLX4 wireless receiver; BLX2/PG58 handheld transmitter with integrated PG58 cardioid dynamic microphone capsule; microphone clip.