The RMCO30.1-6Sf from Response Microwave Inc is a Directional Coupler with Frequency 1 to 6 GHz, Coupling 30 +/- 1.0 dB, Coupling Variation 1 dB, Directivity 18 dB, Average Power 50 W. Tags: Module with Connectors. More details for RMCO30.1-6Sf can be seen below.