The QDDC-0.009-100-K2-40-NS from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±0.5 dB, Frequency 9 kHz to 100 MHz, Average Power 200 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-0.009-100-K2-40-NS can be seen below.