The JIC4000T5000S1R from JQL Electronics is a RF & Microwave Isolator with Frequency 4 to 5 GHz, Average Power Forward 20 W, Average Power Reverse 10 W, Insertion Loss 0.35 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC4000T5000S1R can be seen below.