The QSDC-4000-16000-30-10-S from Qualwave is a Directional Coupler with Frequency 4000 to 16000 MHz, Coupling 10±1.2 dB, Directivity 12 dB, Average Power 30 W, Insertion Loss 1.2 dB. Tags: Module with Connectors. More details for QSDC-4000-16000-30-10-S can be seen below.