The QDDC-2-30-2K-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1.5 dB, Frequency 2 to 30 MHz, Average Power 2000 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-2-30-2K-50-NS can be seen below.