The RMCO20.8000Sf from Response Microwave Inc is a Directional Coupler with Frequency 4 to 8 GHz, Coupling 20 +/- 0.5 dB, Coupling Variation 0.5 dB, Directivity 18 dB, Insertion Loss 0.7 dB. Tags: Module with Connectors. More details for RMCO20.8000Sf can be seen below.