The E3XB1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3.5 to 12.8 GHz, Average Power 2 W, Average Power Forward 2 W, Insertion Loss 2.2 dB, Isolation 17 dB. Tags: Module with Connectors, Coaxial Isolator. More details for E3XB1 can be seen below.