The ZX30-9-4+ from Mini Circuits is a Directional Coupler with Frequency 5 MHz to 1.2 GHz, Coupling 8.84 to 8.88 dB, Directivity 14.9 to 21.49 dB, Power 0.5 to 1 W, Average Power 0.5 to 1 W. Tags: Module with Connectors. More details for ZX30-9-4+ can be seen below.