The QSDC-300-18000-30 from Qualwave is a Directional Coupler with Frequency 300 to 18000 MHz, Coupling 6±0.8 to 20±0.8 dB, Directivity 13 dB, Average Power 30 W, Insertion Loss 1.4 to 3 dB. Tags: Module with Connectors. More details for QSDC-300-18000-30 can be seen below.