Countryman B3W5FF05BAT B3 Omnidirectional Wireless Round Lavalier Microphone for Audio Technica Transmitters (Black) B3 omnidirectional wireless round lavalier microphone is ideal for theater, news anchors, interviews, lecturers, and general lavalier applications Fits Audio Technica transmitter models T27, T31, T51, T200, T201, T210, T300, T310; 1100, 1400, 2000, 3000 series and Hirose 4 pin connector Highly resistant to moisture and perspiration for use in hair, on the body, or in bad weather Mid gain (red band) for theatre head miking Available in black color