The QSDC-6000-40000-20 from Qualwave is a Directional Coupler with Frequency 6000 to 40000 MHz, Coupling 6±0.8 to 30±0.7 dB, Directivity 10 dB, Average Power 30 W, Insertion Loss 1 to 2.6 dB. Tags: Module with Connectors. More details for QSDC-6000-40000-20 can be seen below.