Usually 3-5 Days. The phantom-powered U857RU features a small-diameter gooseneck and Audio-Technica’s UniLine™ line cardioid element which provides more directivity and reduces feedback. The microphone is 16.81 inches long and is equipped with UniGuard RFI-shielding innovations and a UniSteep® filter. The U857RLU is 21" long. Includes flange mount.