The QDDC-380-2000-K3-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1 dB, Frequency 380 to 2000 MHz, Average Power 300 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-380-2000-K3-50-NS can be seen below.