The QDDC-500-3000-K5-60-NS from Qualwave is a Dual Directional Coupler with Coupling 60 dB, Coupling Variation ±2 dB, Frequency 500 to 3000 MHz, Average Power 500 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for QDDC-500-3000-K5-60-NS can be seen below.