The Electro-Voice ULM21 is a professional miniature lavalier microphone designed for discreet, high-quality voice capture in broadcast, theater, corporate presentation, and public speaking applications. Utilizing an omnidirectional condenser capsule, this microphone provides consistent, natural sound pickup from all directions, which is ideal for situations where the wearer may turn their head or where microphone placement cannot be perfectly oriented toward the mouth. Its miniature size allows for nearly invisible placement on clothing, lapels, or within hair, making it a preferred choice for television hosts, theater actors, and presenters where visual aesthetics are as important as audio clarity.

Housed in a durable yet lightweight metal casing, the ULM21 is built to withstand the rigors of daily professional use and is terminated with a standard 3-pin mini-XLR connector for reliable connection to compatible wireless bodypack transmitters. The package typically includes a comprehensive set of mounting accessories such as alligator clips, tie-clips, and windscreens to facilitate secure and optimal placement on various types of attire. The microphone's design prioritizes resistance to handling noise and clothing rustle, while its moisture-resistant construction helps protect against perspiration, a common concern in live performance and extended wear situations.

Integrating this lavalier into a wireless system provides presenters and performers with complete freedom of movement and the assurance of consistent audio capture. The microphone's ability to deliver a clean, transparent signal with a wide frequency response ensures that speech remains intelligible and natural-sounding, even in acoustically challenging environments. By combining a discreet form factor with robust professional-grade performance, the ULM21 offers a reliable and effective solution for critical speech reinforcement where both visual subtlety and audio fidelity are paramount.