The SMI-5878 from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 5.8 to 7.8 GHz, Average Power Reverse 2 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for SMI-5878 can be seen below.