The UA8-470-636 Wideband 1/2 Wave Receiver Antenna from Shure is a single UHF omnidirectional antenna for the front of a rack receiver. It can be used with Shure UHF-R, ULX, SLX, QLX-D, ULX-D, and BLX4R receivers (frequency range dependent) and PSM transmitters (sold separately). IN addition, it features 0-, 45-, and 90-degree positioning for increased stability.