The QSDC-500-18000-K25 from Qualwave is a Directional Coupler with Frequency 500 to 18000 MHz, Coupling 30±1.2 to 40±1.2 dB, Directivity 10 dB, Average Power 250 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for QSDC-500-18000-K25 can be seen below.