Countryman B3W4FF05BSR B3 Omni-Directional Wireless Round Lavalier Microphone for Sennheiser Transmitters (Black) B3 omnidirectional wireless round lavaliere microphone is ideal for theater, news anchors, interviews, lecturers, and general lavaliere applications Fits Sennheiser transmitter models Evolution series, EW100 (G2/G3), EW300 (G2/G3), EW500 (G2/G3), SK 1093 and 3.5-mm locking connector Highly resistant to moisture and perspiration for use in hair, on the body, or in bad weather Standard gain (no band) for most uses Available in black color