PGXD4-X8 is a wireless receiver with 902 to 928MHz frequency band. It provides with choice of microphone cartridge. 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.