The QSDC-300-700-K5-50-NS from Qualwave is a Directional Coupler with Frequency 300 to 700 MHz, Coupling 50±1 dB, Directivity 20 dB, Average Power 500 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QSDC-300-700-K5-50-NS can be seen below.