Usually 3-5 Days. The U857AU features a small-diameter gooseneck and A-T’s UniLine™ line-cardioid element provides more pattern directivity and reduces feedback. It operates on battery or phantom power and is 16.81 inches long. It is equipped with UniGuard RFI-shielding innovations and a UniSteep® filter. Attaches to 5/8"-27 thread flange mount included.