The CAK-4310MC-DF from Xiamen HDG Telecom Equipments is a Between Series RF Adapter with PIM -165 dBc, Frequency DC to 6 GHz, Mating Cycles 500 Cycles, Insulation Resistance 5000 MOhms(Dielectric Resistance), Temperature -40 to 85 Degree C. More details for CAK-4310MC-DF can be seen below.