The QSDC-2000-4000-K5-50-NS from Qualwave is a Directional Coupler with Frequency 2000 to 4000 MHz, Coupling 50±1.5 dB, Directivity 20 dB, Average Power 500 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for QSDC-2000-4000-K5-50-NS can be seen below.