The ZFDC-20-5+ from Mini Circuits is a Directional Coupler with Frequency 0.1 MHz to 2 GHz, Coupling 19.34 to 20.18 dB, Directivity 18.4 to 34.79 dB, Power 0.5 to 2 W, Average Power 0.5 to 2 W. Tags: Module with Connectors. More details for ZFDC-20-5+ can be seen below.