The A25764B is a Low Profile Wideband Antenna. It is for the 764/869 MHz Public Service bands. In addition, it has unity gain.
These A25764B antennas use the finest corrosion resistant materials and finishes available. They provide great performance in a low profile package.
Furthermore. the ABS base has an ultrasonically welded brass insert and a spring loaded contact for long term reliability. These antennas mate with a standard TAD/NMO type mount, providing an excellent moisture seal even when antenna is removed.
Comtelco antennas, now a Mobile Mark brand.