The QSDC-8000-12000-40-15-S from Qualwave is a Directional Coupler with Frequency 8000 to 12000 MHz, Coupling 15±1 dB, Directivity 12 dB, Average Power 40 W, Insertion Loss 0.8 dB. Tags: Module with Connectors. More details for QSDC-8000-12000-40-15-S can be seen below.