Comfortable Cardioid Capture for Shure Setups Adhering to Countryman's most popular headset microphone design, the Isomax cardioid headset is an excellent equipment choice for lecturers, performing artists, and other live presenters working with Shure transmitters. The mic's cardioid polar pattern on the speaker passively blocks sound from external sources for an exceptionally clear signal and warm, legible audio. Likewise, a 20Hz to 20kHz frequency response gives the Isomax's microphone balanced vocal capture for lifelike sound. The headset's telescoping band and boom are adjustable to provide a contoured fit to any user, ensuring comfort on the stage during longer-than-expected presentation situations. Fit with an SL connector, the Isomax cardioid headset is intended for use with compatible Shure transmitters. Note: The Countryman Isomax cardioid headset microphone features an SL connector for use with Shure transmitters. Contact your Sweetwater Sales Engineer with any questions regarding device compatibility.Countryman Isomax Cardioid Headset Microphone with SL