The Aerpro CBA15 3dBi 477MHz 150mm Flexible UHF Antenna Whip is compatible with Aerpro Elevated Feed UHF Antennas and other major brands with 5/16" mounting threads. With 3dBi gain, this low gain antenna has a broad radiation pattern which is best suited for short range communication in highly built up areas including cities, dense woodlands and mountain regions. It produces a wider UHF signal compared to higher gain antennas which is less likely to be impacted by obstructions in these landscapes. The compact 150mm antenna whip features a high quality flexible design which is weather sealed and fitted with a 5/16" thread for easy removal. This antenna whip is ground dependent, so it is recommended to be mounted on an elevated feed base or ground plane for maximum performance. The CBA15 is a discrete size antenna whip but can deliver the range when you need it.