The QDDC-1-10-K15-20-S from Qualwave is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±0.5 dB, Frequency 1 to 10 MHz, Average Power 150 W, Insertion Loss 0.2 dB. Tags: Module with Connectors. More details for QDDC-1-10-K15-20-S can be seen below.