The DC1601004000GH from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 16 dB, Coupling Variation ±0.5 to ±1.0 dB(Accuracy), Frequency Sensitivity ±1.0 to ±1.2 dB, Directivity 10 to 11 dB. Tags: Module with Connectors. More details for DC1601004000GH can be seen below.