This is the antenna that Uniden
recommends be used with their scanners as a replacement
antenna. The BNC model the replacement antenna model that is used on
scanners such as the BC220, BC230, BC235 and BC245XLT
scanners. The SMA model can be used with the BCD396T,
BCD396XT, BC346T and BC346XT. The SMA mount looks like a
threaded connector and the BNC will have a pin in the center
of the connector.