Introducing the Shure UA820J 1/2 Wave Omnidirectional Receiver Antenna, designed to deliver outstanding performance and reliable signal reception for your Shure wireless bodypacks. Operating in the 578-638 MHz frequency range, this antenna is ideal for use with popular Shure systems such as UHF-R, ULX, and SLX receivers. Whether you're a professional musician, sound engineer, or event organizer, the UA820J ensures that your wireless equipment functions at its best, providing clear and uninterrupted audio reception.