The QSDC-400-6000-20 from Qualwave is a Directional Coupler with Frequency 400 to 6000 MHz, Coupling 5±1 to 22 dB, Directivity 12 dB, Average Power 20 W, Insertion Loss 1 to 2.3 dB. Tags: Module with Connectors. More details for QSDC-400-6000-20 can be seen below.