This system includes a receiver base unit and two wireless microphones. The receiver has two antennas, a power button, and a display showing the frequency channels (630.000 MHz and 658.000 MHz). The microphones are black with the JBL logo and have a power switch. The packaging highlights the system's "patented Audio Reference Companding for crystal-clear sound." Wireless microphone systems consist of a transmitter and a receiver, and they are often used for live performances, presentations, and karaoke. JBL offers wireless microphones compatible with its PartyBox speakers.