The DC4-10S-1.25 from MegaPhase is a Directional Coupler with Frequency 500 MHz to 2 GHz, Coupling 10 dB, Coupling Variation ±0.75 dB, Directivity 23 dB, Average Power 50 W. Tags: Module with Connectors. More details for DC4-10S-1.25 can be seen below.