The ZMDC-30-1+ from Mini Circuits is a Directional Coupler with Frequency 0.1 to 250 MHz, Coupling 30.66 to 31.09 dB, Directivity 28.18 to 40.64 dB, Power 1 to 3 W, Average Power 1 to 3 W. Tags: Module with Connectors. More details for ZMDC-30-1+ can be seen below.