The QDDC-2000-6000-K25-30-NS from Qualwave is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±0.6 dB, Frequency 2000 to 6000 MHz, Average Power 250 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for QDDC-2000-6000-K25-30-NS can be seen below.