The DC2001004000GH from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 20 dB, Coupling Variation ±0.3 to ±1.0 dB(Accuracy), Frequency Sensitivity ±0.9 to ±1.2 dB, Directivity 10 to 14 dB. Tags: Module with Connectors. More details for DC2001004000GH can be seen below.