The QDDC-6000-10000-50-20-S from Qualwave is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±0.5 dB, Frequency 6000 to 10000 MHz, Average Power 50 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for QDDC-6000-10000-50-20-S can be seen below.