The DC1301004000GA from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 13 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±1.3 dB, Directivity 10 to 12 dB. Tags: Module with Connectors. More details for DC1301004000GA can be seen below.