The QDDC-0.009-1000-K3 from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1.5 dB, Frequency 9 kHz to 1000 MHz, Average Power 300 W, Insertion Loss 0.4 to 0.6 dB. Tags: Module with Connectors. More details for QDDC-0.009-1000-K3 can be seen below.