The SA-DMF-2-0727-SK from Xiamen HDG Telecom Equipments is a RF Surge Protector with Frequency 690 MHz to 2.7 GHz, Insertion Loss 0.1 dB, Operating Temperature -40 to 85 Degree C, Surge Current 20KA(8/20 µs). More details for SA-DMF-2-0727-SK can be seen below.