The C2YD4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3 to 3.6 GHz, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature 0 to 60 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for C2YD4 can be seen below.