The C2-A28MF from RD Microwaves is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±0.25 dB, Frequency 1.7 to 2.2 GHz, Peak Power 5 KW, Average Power 500 W. Tags: Module with Connectors. More details for C2-A28MF can be seen below.