The 4015C-20 from Narda-MITEQ is a Directional Coupler with Frequency 7 to 12.4 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.50 dB, Directivity 17 dB. Tags: Module with Connectors. More details for 4015C-20 can be seen below.