The QSDC-2000-18000-K4 from Qualwave is a Directional Coupler with Frequency 2000 to 18000 MHz, Coupling 30±1 to 40±1 dB, Directivity 10 dB, Average Power 400 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for QSDC-2000-18000-K4 can be seen below.