The ZNDC-18-2G+ from Mini Circuits is a Directional Coupler with Frequency 800 MHz to 2 GHz, Coupling 17.96 to 18.76 dB, Directivity 22.69 to 39.09 dB, Power 3 W, Average Power 3 W. Tags: Module with Connectors. More details for ZNDC-18-2G+ can be seen below.