The RMCO20.3600Sf from Response Microwave Inc is a Directional Coupler with Frequency 3.4 to 3.6 GHz, Coupling 20 +/- 0.5 dB, Coupling Variation 0.5 dB, Directivity 15 dB, Average Power 10 W. Tags: Module with Connectors. More details for RMCO20.3600Sf can be seen below.