The DCE30S-2-8-500 from ESJ Technology is a Directional Coupler with Frequency 2 to 8 GHz, Coupling 30 dB, Coupling Variation ±1 dB, Directivity 14 dB, Average Power 500 W. Tags: Module with Connectors. More details for DCE30S-2-8-500 can be seen below.