The CAK-NF-SMAM from Xiamen HDG Telecom Equipments is a Between Series RF Adapter with Frequency DC to 3 GHz, Mating Cycles 500 Cycles, Insulation Resistance 10000 MOhms, Temperature -40 to 85 Degree C, Voltage Rating 4000 V (Dielectric Withstanding Voltage). More details for CAK-NF-SMAM can be seen below.