The IS-189/NMO from MCLI is a RF & Microwave Isolator with Frequency 5.2 to 5.8 GHz, Average Power Forward 1 W, Insertion Loss 0.5 dB, Isolation 22 dB, Operating Temperature 0 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-189/NMO can be seen below.