The DDH 40225570 from Quantic TRM is a Dual Directional Coupler with Coupling 20 to 40 dB, Coupling Variation ± 0.5 dB, Frequency 225 to 570 MHz, Average Power 50 W, Insertion Loss 0.2 dB. Tags: Module with Connectors. More details for DDH 40225570 can be seen below.