The QDDC-2-30-30K-68-1 from Qualwave is a Dual Directional Coupler with Coupling 68 dB, Coupling Variation ±0.6 dB, Frequency 2 to 30 MHz, Average Power 30000 W, Insertion Loss 0.05 dB. Tags: Module with Connectors. More details for QDDC-2-30-30K-68-1 can be seen below.