The QDDC-6000-8000-30-30-S from Qualwave is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 6000 to 8000 MHz, Average Power 30 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QDDC-6000-8000-30-30-S can be seen below.