The QSDC-500-8500-K1-40-N from Qualwave is a Directional Coupler with Frequency 500 to 8500 MHz, Coupling 40±2 to 41±3.5 dB, Directivity 12 dB, Average Power 100 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QSDC-500-8500-K1-40-N can be seen below.