The 994-037599-004 from M2 Global Technology is a RF & Microwave Isolator with Frequency 7.85 to 8.45 GHz, Average Power Reverse 10 W, Insertion Loss 0.2 dB, Isolation 23 dB, Operating Temperature 0 to 65 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for 994-037599-004 can be seen below.