The C1DK3 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.85 to 1.99 GHz, Average Power 1 W, Average Power Forward 1 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for C1DK3 can be seen below.