The QDDC-0.009-250-K6-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±2 dB, Frequency 9 kHz to 250 MHz, Average Power 600 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for QDDC-0.009-250-K6-50-NS can be seen below.