The QDDC-700-18000-K25 from Qualwave is a Dual Directional Coupler with Coupling 30 to 40 dB, Coupling Variation ±1.2 dB, Frequency 700 to 18000 MHz, Average Power 250 W, Insertion Loss 0.9 dB. Tags: Module with Connectors. More details for QDDC-700-18000-K25 can be seen below.