The DB40-008060SF from Corech Microwave is a Dual Directional Coupler with Coupling 40 dB (Nominal), Coupling Variation ±2 dB (Balance), Frequency 0.8 to 6 GHz, Peak Power 1 kW, Average Power 50 W (CW). Tags: Module with Connectors, 50 W, 40 dB Dual-Directional Coupler from 0.8 to 6 GHz. More details for DB40-008060SF can be seen below.