The RC3538XS-690-810 from ZTS Technologies is a RF & Microwave Circulator with Frequency 690 to 810 MHz, Average Power Forward 100 W, Insertion Loss 0.3 dB, Isolation 23 dB, Operating Temperature -10 to 60 Degree C. Tags: Module with Connectors, Coaxial Circulator. More details for RC3538XS-690-810 can be seen below.