The ZX30-13-4+ from Mini Circuits is a Directional Coupler with Frequency 5 MHz to 1.2 GHz, Coupling 12.92 to 13.34 dB, Directivity 12.99 to 21.86 dB, Power 0.5 to 1 W, Average Power 0.5 to 1 W. Tags: Module with Connectors. More details for ZX30-13-4+ can be seen below.