The QSDC-400-20000-10-20-S from Qualwave is a Directional Coupler with Frequency 400 to 20000 MHz, Coupling 20±1.5 dB, Directivity 8 to 10 dB, Average Power 10 W, Insertion Loss 1.5 dB. Tags: Module with Connectors. More details for QSDC-400-20000-10-20-S can be seen below.