The 317.2004-20/NF from Microwave Devices Inc. is a Directional Coupler with Frequency 1.85 to 3.65 GHz, Coupling 20±1.25 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.85 dB, Directivity 18 dB. Tags: Module with Connectors. More details for 317.2004-20/NF can be seen below.