The DC1001000400GA from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 1 to 4 GHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.7 dB, Directivity 20 dB. Tags: Module with Connectors. More details for DC1001000400GA can be seen below.