The QDDC-200-700-K2-30-S from Qualwave is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 200 to 700 MHz, Average Power 200 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-200-700-K2-30-S can be seen below.