The OH-T-10400-20 from A-Info is a Directional Coupler with Frequency 1.0 to 40.0 GHz, Coupling 20 dB, Coupling Variation ±1.00 dB, Directivity 10 dB, Insertion Loss 1.8 dB. Tags: Module with Connectors. More details for OH-T-10400-20 can be seen below.