The DC1001004000GH1 from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±1 dB, Directivity 10 to 14 dB. Tags: Module with Connectors. More details for DC1001004000GH1 can be seen below.