The C1-A60D-8-XX from RD Microwaves is a Directional Coupler with Frequency 400 MHz to 13 GHz, Coupling 8 dB, Coupling Variation ±0.2 dB, Frequency Sensitivity ±0.8 dB, Directivity 3 to 16 dB. Tags: Module with Connectors. More details for C1-A60D-8-XX can be seen below.