The QDDC-1-30-3K-60-NS from Qualwave is a Dual Directional Coupler with Coupling 60 dB, Coupling Variation ±1 dB, Frequency 1 to 30 MHz, Average Power 3000 W, Insertion Loss 0.1 dB. Tags: Module with Connectors. More details for QDDC-1-30-3K-60-NS can be seen below.