The DB10-180400KF from Corech Microwave is a Dual Directional Coupler with Coupling 10 dB (Nominal), Coupling Variation ±1 dB (Balance), Frequency 18 to 40 GHz, Peak Power 0.5 kW, Average Power 30 W (CW). Tags: Module with Connectors, 30 W, 10 dB Dual-Directional Coupler from 18 to 40 GHz. More details for DB10-180400KF can be seen below.