The QDDC-1000-2000-K5-40-N from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±2 dB, Frequency 1000 to 2000 MHz, Average Power 500 W, Insertion Loss 0.25 dB. Tags: Module with Connectors. More details for QDDC-1000-2000-K5-40-N can be seen below.