The QSDC-3000-6000-10-20-S from Qualwave is a Directional Coupler with Frequency 3000 to 6000 MHz, Coupling 20±1 dB, Directivity 18 dB, Average Power 10 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QSDC-3000-6000-10-20-S can be seen below.