The QSDC-4000-12000-50-6-S from Qualwave is a Directional Coupler with Frequency 4000 to 12000 MHz, Coupling 6±1 dB, Directivity 12 dB, Average Power 50 W, Insertion Loss 1.2 dB. Tags: Module with Connectors. More details for QSDC-4000-12000-50-6-S can be seen below.