The D20B00450800 from Fujian MIcable is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±0.8 dB, Frequency 0.45 to 8 GHz, Peak Power 3000 W, Average Power 30 W. Tags: Module with Connectors. More details for D20B00450800 can be seen below.