The DC3000501800GA from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 0.5 to 18 GHz, Coupling 30 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±1 dB, Directivity 10 to 12 dB. Tags: Module with Connectors. More details for DC3000501800GA can be seen below.