The QDDC-1200-1400-3K-40-NS from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1 dB, Frequency 1200 to 1400 MHz, Average Power 3000 W, Insertion Loss 0.1 dB. Tags: Module with Connectors. More details for QDDC-1200-1400-3K-40-NS can be seen below.