2.92mm series RF coaxial adapter, frequency up to 40GHz, because it is compatible with SMA connector series and 3.5mm series, compared with 3.5mm, and SMA connectors, 2.92 mm connectors pin short, mesh, outer conductor alignment, so 2.92mm connector Jack for higher reliability. 2.92mm is currently in the millimeter-wave products most commonly used type of connector.