The 4229-10 from Narda-MITEQ is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 10 dB, Coupling Variation ±1.50 dB, Frequency Sensitivity ±1.0 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for 4229-10 can be seen below.