2.Product description: (1)Impedance :50 ohm. (2)RF adapter product line includes in-series RF adapters design and between series adapter designs as well as T and Cross RF adapters. (3)RF adapters cost effective solution,which is high quality and quick combinations by simply screwing two connectors together, with no soldering or crimping required. (4) S0-239 UHF female connector.used for connecting two PL-259 connectors together. Package include: 2x UHF PL259 Male to F Female Connector 2x S0-239 UHF female connector