This item is new and unopened. Because it is on closeout there are no returns. Shure states that this unit is not for use with the ULX series.
The Shure UA845US 5-way Active Antenna Distribution System was designed to work in the 500-900MHz frequency range. This product was discontinued because the frequencies it covers include the 700MHz range, which is no longer usable for wireless systems due to the 2010 FCC regulatory changes. However, it can still be used for the other frequency ranges without violating the regulations.
