The 994-037854-004 from M2 Global Technology is a RF & Microwave Isolator with Frequency 5.85 to 6.42 GHz, Average Power Reverse 10 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature 0 to 50 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for 994-037854-004 can be seen below.