The Product is confusing: With RG174 cable, the adapter has nothing to do. It serves only to convert the "strange" male SMA standard BNC since BNC is used in our western society further. Usually RG58 (50 Ohm) or RG59 (75 Ohm) is soldered to the BNC connectors Cable type. BNC connector with RG174 cable are in the VHF / UHF range is not useful due to the high cable attenuation.