The QSDC-500-18000-50 from Qualwave is a Directional Coupler with Frequency 500 to 18000 MHz, Coupling 10±1 to 30±1.8 dB, Directivity 10 to 15 dB, Average Power 50 W, Insertion Loss 0.7 to 1.8 dB. Tags: Module with Connectors. More details for QSDC-500-18000-50 can be seen below.