The QSDC-410-490-3K-50-NS from Qualwave is a Directional Coupler with Frequency 410 to 490 MHz, Coupling 50±0.5 dB, Directivity 20 dB, Average Power 3000 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QSDC-410-490-3K-50-NS can be seen below.