The QDDC-12000-18000-80-35-S from Qualwave is a Dual Directional Coupler with Coupling 35 dB, Coupling Variation ±1 dB, Frequency 12000 to 18000 MHz, Average Power 80 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QDDC-12000-18000-80-35-S can be seen below.