The QSDC-8000-8400-20 from Qualwave is a Directional Coupler with Frequency 8000 to 8400 MHz, Coupling 10±1 to 20±1 dB, Directivity 12 dB, Average Power 20 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for QSDC-8000-8400-20 can be seen below.