The OH-T-4200-30 from A-Info is a Directional Coupler with Frequency 0.4 to 20.0 GHz, Coupling 30 dB, Coupling Variation ±1.00 dB, Directivity 14 dB, Insertion Loss 0.9 dB. Tags: Module with Connectors. More details for OH-T-4200-30 can be seen below.