The Sennheiser MMD 935 Microphone Capsule head is specifically designed for use with their Evolution D1 AVX SpeechSeries and 2000 series Wireless Handheld Transmitters. With a cardioid polar pick-up pattern this Sennheiser Microphone Head provides a focused sound that is protected from feedback and surrounding noises. The MMD 935 matches the excellent acoustic properties of the e935 wired microphone and provides a fully professional vocal performance. Using the cardioid pick-up pattern you can isolate other sound sources around your performer. Meaning the Microphone Head focuses on what matters - the performance. It prevents spillover from other instruments on stage meaning that the singers performance is recreated with pinpoint accuracy. The MMD 935-1 BK also features uniform on-axis and off-axis response. So no matter how energetic their performance - the sound is always on point.