The E-Mic is a noise-canceling microphone and can be used in the most acoustically challenging rooms. It is one of the few headsets out there that is specifically designed for Group Exercise training to prevent the sweat death many instructors run into with other major brands of microphones. The boom is 1/2" longer than the traditional boom.
This is the black with "RED" neck stripe. Ignore the photo with the blue neck stripe.
Note: See image with both e-mics for size comparison.