The Shure PGXD4 receiver offers innovative 24-bit, 48 kHz digital audio technology for wireless that sounds like wired. True digital diversity means two antennas and two independent receivers are constantly working to provide rock-solid RF signal, and one touch scan finds a clear frequency instantly, making set up a snap.Offering uniquely tailored wireless solutions for vocalists, guitarists, and presenters, PGX-Digital combines the trusted legacy of Shure wired microphones with state-of-the-art, 24-bit digital wireless technology to deliver strong, clean RF performance. The result is wireless audio that sounds like wired, rock-steady RF signal even at extended distances, and plug-and-play setup and operation.