The 504020010 from KRYTAR is a Directional Coupler with Frequency 4 to 20 GHz, Coupling 10 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.8 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for 504020010 can be seen below.