The QDDC-100-1000-K2-20-N from Qualwave is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1 dB, Frequency 100 to 1000 MHz, Average Power 200 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for QDDC-100-1000-K2-20-N can be seen below.