The ZDC9-50L30-520-1514 from COM-MW is a Bi-Directional Coupler with Frequency 30 to 512 MHz, Coupling 48.5 to 51.5 dB, Power 1000 W, Insertion Loss 0.3 dB, Directivity 16 to 20 dB. Tags: Module with Connectors. More details for ZDC9-50L30-520-1514 can be seen below.