The LP-GTR-DFM from Times Microwave Systems is a RF Surge Protector with Frequency DC to 2500 MHz, Input Power 50 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 can be seen below.