The OH-T-20400-16 from A-Info is a Directional Coupler with Frequency 2 to 40 GHz, Coupling 16 dB, Coupling Variation ±0.40 to ±0.70 dB, Directivity 11 to 15 dB, Insertion Loss 0.9 to 1.6 dB. Tags: Module with Connectors. More details for OH-T-20400-16 can be seen below.