The C4YY1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.925 to 5.418 GHz, Average Power 500 W, Average Power Forward 500 W, Insertion Loss 0.6 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for C4YY1 can be seen below.