The LP-GTR-DFM-35 from Times Microwave Systems is a RF Surge Protector with Frequency DC to 2500 MHz, Input Power 550 W, Insertion Loss 0.1 to 0.2 dB, Operating Temperature -40 to 85 Degree C, Return Loss 26 to 28 dB. More details for LP-GTR-DFM-35 can be seen below.