The SA-DMF-2-0825-SK from Xiamen HDG Telecom Equipments is a RF Surge Protector with Frequency 800 MHz to 2.5 GHz, Insertion Loss 0.2 dB, Operating Temperature -40 to 85 Degree C, Surge Current 20KA(8/20 µs). More details for SA-DMF-2-0825-SK can be seen below.