The IS-9 from MCLI is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 50 W, Insertion Loss 0.5 dB, Isolation 17 dB, Operating Temperature 0 to 55 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-9 can be seen below.