The ZX30-9-4-S+ from Mini Circuits is a Directional Coupler with Frequency 5 to 1200 MHz, Coupling 8.9 dB, Coupling Variation ±0.5 dB, Directivity 12 to 21 dB, Average Power 0.5 to 1 W. Tags: Module with Connectors. More details for ZX30-9-4-S+ can be seen below.