Audio-Technica's U857AU incorporates the most essential ingredients for quality sound reproduction for a wide range of installed applications. Equipped with A-T's UniLine line-cardioid element with a tightly focused 90 acceptance angle, the U857AU features a small-diameter gooseneck with virtually no "memory." Its ultra-flexible, robust design permits easy adjustment into desired shape while resisting inadvertent repositioning. The 16.81" long UniLine condenser direct mounts to any 5/8"-27 stand. Featuring UniGuard innovations that offer unsurpassed immunity from radio frequency interference. The battery or phantom powered gooseneck microphone also offers an 80 Hz low-cut UniSteep filter that reduces pickup of low-frequency ambient noise.