The D30N003400 from Fujian MIcable is a Directional Coupler with Frequency 0.3 to 40 GHz, Coupling 30 dB, Coupling Variation ±1.2 dB, Amplitude Flatness ±1.6 dB, Directivity 10 to 13 dB. Tags: Module with Connectors. More details for D30N003400 can be seen below.