The QDDC-8000-12400-K1-40-N from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1 dB, Frequency 8000 to 12400 MHz, Average Power 100 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for QDDC-8000-12400-K1-40-N can be seen below.