The QDDC-1-50-3K-58-NS from Qualwave is a Dual Directional Coupler with Coupling 58 to 64 dB, Coupling Variation ±2 to ±5 dB, Frequency 1 to 50 MHz, Average Power 3000 W, Insertion Loss 0.1 dB. Tags: Module with Connectors. More details for QDDC-1-50-3K-58-NS can be seen below.