The D4005HB004080 from Fujian MIcable is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1 dB, Frequency 0.4 to 8 GHz, Peak Power 3000 W, Average Power 250 W. Tags: Module with Connectors. More details for D4005HB004080 can be seen below.