The RMCO20.3600Nf 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, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for RMCO20.3600Nf can be seen below.