The QSDC-400-2500-K5-50-NS from Qualwave is a Directional Coupler with Frequency 400 to 2500 MHz, Coupling 50±1.2 dB, Directivity 8 dB, Average Power 500 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QSDC-400-2500-K5-50-NS can be seen below.