The QDDC-6000-18000-K25 from Qualwave is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 6000 to 18000 MHz, Average Power 250 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QDDC-6000-18000-K25 can be seen below.