The QDDC-6000-18000-60-20-S from Qualwave is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1 dB, Frequency 6000 to 18000 MHz, Average Power 60 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for QDDC-6000-18000-60-20-S can be seen below.