The QSDC-500-2000-50-20-S from Qualwave is a Directional Coupler with Frequency 500 to 2000 MHz, Coupling 20±0.5 dB, Directivity 20 dB, Average Power 50 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for QSDC-500-2000-50-20-S can be seen below.