The QSDC-1000-18000-K4 from Qualwave is a Directional Coupler with Frequency 1000 to 18000 MHz, Coupling 30±1.2 to 40±1.2 dB, Directivity 10 dB, Average Power 400 W, Insertion Loss 0.8 dB. Tags: Module with Connectors. More details for QSDC-1000-18000-K4 can be seen below.