The QSDC-6000-18000-K35-40-D650S from Qualwave is a Directional Coupler with Frequency 6000 to 18000 MHz, Coupling 40±0.75 dB, Directivity 12 dB, Average Power 350 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QSDC-6000-18000-K35-40-D650S can be seen below.