The QDDC-6000-40000-20 from Qualwave is a Dual Directional Coupler with Coupling 10 to 30 dB, Coupling Variation ±0.9 to ±1 dB, Frequency 6000 to 40000 MHz, Average Power 20 W, Insertion Loss 1.3 to 2.8 dB. Tags: Module with Connectors. More details for QDDC-6000-40000-20 can be seen below.