The OH-T-20400-10 from A-Info is a Directional Coupler with Frequency 2 to 40 GHz, Coupling 10 dB, Coupling Variation ±0.40 to ±0.70 dB, Directivity 11 to 15 dB, Insertion Loss 1.1 to 1.9 dB. Tags: Module with Connectors. More details for OH-T-20400-10 can be seen below.