The QDDC-6000-8000-K15-37-NS from Qualwave is a Dual Directional Coupler with Coupling 37 dB, Coupling Variation ±0.5 dB, Frequency 6000 to 8000 MHz, Average Power 150 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-6000-8000-K15-37-NS can be seen below.