The C1-A85-30 from RD Microwaves is a Directional Coupler with Frequency 500 MHz to 12.4 GHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity 0.9 dB, Directivity 13 to 20 dB. Tags: Module with Connectors. More details for C1-A85-30 can be seen below.