The C1YR4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.93 to 1.99 GHz, Average Power 50 W, Average Power Forward 50 W, Insertion Loss 0.3 dB, Isolation 25 dB. Tags: Drop-In, Drop-In Isolator. More details for C1YR4 can be seen below.