The ZDC15S-2-18-50A from ZTS Technologies is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 15 dB, Coupling Variation ±1 dB, Directivity 12 dB, Average Power 50 Watts. Tags: Module with Connectors. More details for ZDC15S-2-18-50A can be seen below.