Shure's WL50B lavalier electret-condenser microphone is designed for use with T4AF equipped wireless body-pack transmitters. They are small, black, and visually unobtrusive. The WL50B is ideal for use in theater, film, broadcast, worship services, and any other time minimal microphone visibility is an important. The WL50B comes with a 5' (1.5m meter) cable terminated with a miniature four-pin connector, two foam windscreens, a dual tie clip, magnet mount, and mini mount. Sporting a full 20Hz - 20kHz frequency response, and with a 5.8mm diameter and an 11mm height, the WL50B is one powerful little microphone!