The 4012C-30 from Narda-MITEQ is a Directional Coupler with Frequency 1 to 2 GHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.75 dB, Directivity 27 dB. Tags: Module with Connectors. More details for 4012C-30 can be seen below.