The ZDC20S-2-4-50A from ZTS Technologies is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 20 dB, Average Power 50 Watts. Tags: Module with Connectors. More details for ZDC20S-2-4-50A can be seen below.