The QDDC-0.01-260-K25-40-NNM from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1 dB, Frequency 0.01 to 260 MHz, Average Power 250 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-0.01-260-K25-40-NNM can be seen below.