The QDDC-300-10000-K1 from Qualwave is a Dual Directional Coupler with Coupling 10 to 20 dB, Coupling Variation ±0.5 to ±1 dB, Frequency 300 to 10000 MHz, Average Power 100 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for QDDC-300-10000-K1 can be seen below.