The PRF-DI12040-30 from Premier RF is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 20 ± 1.25 dB, Coupling Variation ± 1.25 dB, Directivity 22 dB Min, Power 50 Watts. Tags: Module with Connectors. More details for PRF-DI12040-30 can be seen below.