The HDC1105-30 from Federal Custom Cable is a Directional Coupler with Frequency 1.5 to 4.5 GHz, Coupling 30 dB, Coupling Variation +/- 1 dB, Frequency Sensitivity +/- 0.6 dB, Directivity 18 dB. Tags: Module with Connectors. More details for HDC1105-30 can be seen below.