Countryman MHCW5HH05BAT  W5 ISOMAX Cardioid Headset Microphone for Audio Technica Transmitters (Black) W5 ISOMAX cardioid headset microphone Fits Audio Technica transmitter models T27, T31, T51, T200, T201, T210, T300, T310, 1100 Series, 1400 Series, 2000 Series, 3000 Series It's affordable and durable, providing a long life of excellent sound Extremely popular among high-profile rock performers onstage and in the studio Available in black color