The C2-A71 from RD Microwaves is a Directional Coupler with Frequency 12.4 to 18 GHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity 0.60 dB, Directivity 15 dB. Tags: Module with Connectors. More details for C2-A71 can be seen below.