The GL-T-2000-4000-18-5 from A-Info is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 5 W, Average Power Reverse 1 W, Insertion Loss 0.6 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for GL-T-2000-4000-18-5 can be seen below.