The ZDC20S-2-18-10A from ZTS Technologies is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 12 dB, Average Power 10 Watts. Tags: Module with Connectors. More details for ZDC20S-2-18-10A can be seen below.