The IS-76/S from MCLI is a RF & Microwave Isolator with Frequency 4.1 to 5.3 GHz, Average Power Forward 2 W, Peak Power Forward 0.1 kW, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for IS-76/S can be seen below.