The Shure BLX24R/PG58-H8E Rack Mount Wireless Microphone System is a UHF wireless system with an operational frequency of 518 - 542 MHz. With Shures quick-scan frequency finding technology a simple button-press will find an open UHF frequency that you can use straight away. If interference starts to interrupt your transmission you can scan again to find a new open frequency instantaneously. Built to provide the same quality that youd find with wired audio the BLX24R shows why Shure are one of the industry leaders in wireless audio. The PG58 handheld microphone provides a professional high-quality signal with a dynamic cardioid capsule design for a tight focused pickup ideal for making sure vocals cut through the venue. Whether its speech interview or live vocals the PG58 makes sure your voice comes through clearly. With durable construction and a neodymium magnet the PG58 provides not only clarity and quality but reliability able to handle high-pressure signals and reproduce them without distortion.