The QATT from Qualwave is a In Series RF Adapter with Frequency DC to 18 GHz, Contact Resistance 0.2 mOhms (Outer) / 1.5 mOhms (Center), Mating Cycles 500 Cycles, Temperature -55 to 165 Degree C / -45 to 125 Degree C, Voltage Rating 750 to 1000 V (RMS). More details for QATT can be seen below.