The 094-037537-004 from M2 Global Technology is a RF & Microwave Isolator with Frequency 1.8 to 2.1 GHz, Average Power Reverse 10 W, Insertion Loss 0.4 dB, Isolation 23 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for 094-037537-004 can be seen below.