The Audio-Technica U841A is an omnidirectional boundary microphone designed for highly intelligible sound reinforcement, professional recording, television and conferencing in surface-mount applications. The microphone's omnidirectional polar pattern is capable of accurately reproducing audio at 360 degrees. The surface mounted U841A features a polarized condenser element that reproduces audio with crisp detail and pristine fidelity. UniGuard RFI-shielding protects against radio frequency interference. The microphone is powered via phantom or 1.5V AA battery power, an external in-line phantom power supply is included. The U841A is an excellent choice for capturing conferences, meetings, broadcasts, performances, ambiance and more.