The QDDC-1000-6000-K5-40-NS from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1 dB, Frequency 1000 to 6000 MHz, Average Power 500 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QDDC-1000-6000-K5-40-NS can be seen below.