The Shure UA400 is a 1/4 wave UHF antenna designed to improve the performance of Shure wireless receivers, particularly the SLX4, SLX4L, U4S, U4D, and UC4 models. It operates within the 774-952 MHz frequency range and connects via a BNC connector. The UA400 is a passive antenna, meaning it does not require external power. It’s a common replacement antenna for various Shure wireless systems.
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