The ZDC-20-3-75+ from Mini Circuits is a Directional Coupler with Frequency 1 to 150 MHz, Coupling 19.35 to 19.56 dB, Directivity 29.43 to 56.88 dB, Power 2 to 4 W, Average Power 2 to 4 W. Tags: Module with Connectors. More details for ZDC-20-3-75+ can be seen below.