The RMCO20.1220Sf from Response Microwave Inc is a Directional Coupler with Frequency 960 MHz to 1.22 GHz, Coupling 20 +/- 0.5 dB, Coupling Variation 0.5 dB, Directivity 20 dB, Insertion Loss 0.1 dB. Tags: Module with Connectors. More details for RMCO20.1220Sf can be seen below.