Wireless microphone systems are sets of components that allow performers, musicians, speakers, content creators, interviewers/interviewees, and actors/actresses to move freely around indoor and outdoor spaces without the hassle of long cables for audio signals. For news gathering, sports broadcasts, concerts, theater, music, and sermons in houses of worship, conferences, weddings, TV/video/film production, and more, wireless audio systems are a vital part of capturing voices, instruments, sound effects, and ambience. Whether you buy a complete wireless system that's ready to use out of the box, or you purchase pieces to upgrade or expand an existing system, it's important to be familiar with the components you're likely to encounter.