The ZX30-13-4-S+ from Mini Circuits is a Directional Coupler with Frequency 5 to 1200 MHz, Coupling 13.0 dB, Coupling Variation ±0.5 dB, Directivity 10 to 21 dB, Average Power 0.5 to 1 W. Tags: Module with Connectors. More details for ZX30-13-4-S+ can be seen below.