The QSDC-300-40000-20-30-K from Qualwave is a Directional Coupler with Frequency 300 to 40000 MHz, Coupling 30±1.2 dB, Directivity 10 dB, Average Power 20 W, Insertion Loss 4.2 dB. Tags: Module with Connectors. More details for QSDC-300-40000-20-30-K can be seen below.