The SMI-3570 from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 3.5 to 7 GHz, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for SMI-3570 can be seen below.