The QDDC-0.03-30-5K25-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1 dB, Frequency 0.03 to 30 MHz, Average Power 5250 W, Insertion Loss 0.05 dB. Tags: Module with Connectors. More details for QDDC-0.03-30-5K25-50-NS can be seen below.