The ZX30-17-5-S+ from Mini Circuits is a Directional Coupler with Frequency 5 to 2000 MHz, Coupling 16.8 to 18.5 dB, Coupling Variation ±0.7 to 1 dB, Directivity 12 to 18 dB, Average Power 0.5 to 1 W. Tags: Module with Connectors. More details for ZX30-17-5-S+ can be seen below.