The Shure WA661 is an in-line mute switch designed for use with one Shure bodypack transmitter, providing convenient, instant muting of the connected microphone. Compact and lightweight, the WA661 is equipped with a belt clip for hands-free use and integrates seamlessly between the bodypack and lavalier, headset, or instrument cable. Ideal for presenters, performers, worship leaders, and on-field sports referees, this accessory allows discreet microphone control without needing to access the transmitter directly. Built with Shure’s reliable construction, the WA661 ensures durability and consistent performance in professional AV environments.