The QSDC-500-50000-20 from Qualwave is a Directional Coupler with Frequency 500 to 50000 MHz, Coupling 10±1.2 to 20±1.2 dB, Directivity 8 dB, Average Power 20 W, Insertion Loss 3.3 to 3.6 dB. Tags: Module with Connectors. More details for QSDC-500-50000-20 can be seen below.