The QDDC-500-2000-K8-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±0.8 dB, Frequency 500 to 2000 MHz, Average Power 800 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-500-2000-K8-50-NS can be seen below.