The ZFDC-10-21-75 from Mini Circuits is a Directional Coupler with Frequency 10 to 750 MHz, Coupling 10.96 to 11.72 dB, Directivity 33.16 to 60.33 dB, Power 1 to 2 W, Average Power 1 to 2 W. Tags: Module with Connectors. More details for ZFDC-10-21-75 can be seen below.