The JI2C4200T4400SFTSM1 from JQL Electronics is a RF & Microwave Isolator with Frequency 4.2 to 4.4 GHz, Average Power Forward 20 W, Average Power Reverse 10 W, Insertion Loss 0.4 to 0.6 dB, Isolation 40 dB. Tags: Module with Connector, Coaxial Isolator. More details for JI2C4200T4400SFTSM1 can be seen below.