The JIC2000T4000S1R from JQL Electronics is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 30 W, Average Power Reverse 2 W, Peak Power Forward 0.05 kW, Insertion Loss 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC2000T4000S1R can be seen below.