The QDDC-25-1000-1K-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1.5 dB, Frequency 25 to 1000 MHz, Average Power 1000 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QDDC-25-1000-1K-50-NS can be seen below.