The QDDC-12-14-4K-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1 dB, Frequency 12 to 14 MHz, Average Power 4000 W, Insertion Loss 0.1 dB. Tags: Module with Connectors. More details for QDDC-12-14-4K-50-NS can be seen below.