The LP-GTR-NFF-35 from Times Microwave Systems is a RF Surge Protector with Frequency DC to 3000 MHz, Input Power 550 W, Insertion Loss 0.1 to 0.2 dB, Operating Temperature -40 to 85 Degree C, Return Loss 24 to 26 dB. More details for LP-GTR-NFF-35 can be seen below.