The CAK-NM-SMAM from Xiamen HDG Telecom Equipments is a Between Series RF Adapter with Contact Resistance 1 to 1.5 mOhms, Frequency DC to 3 GHz, Mating Cycles 500 Cycles, Insulation Resistance 5000 MOhms, Temperature -40 to 85 Degree C. More details for CAK-NM-SMAM can be seen below.