The C2-A12 from RD Microwaves is a Dual Directional Coupler with Coupling 30 to 31 dB, Coupling Variation ±1.5 to ±2 dB, Frequency 380 MHz to 3 GHz, Peak Power 5 KW, Average Power 500 W. Tags: Module with Connectors. More details for C2-A12 can be seen below.