The HDC1108-30 from Federal Custom Cable is a Directional Coupler with Frequency 2.6 to 5.2 GHz, Coupling 30 dB, Coupling Variation +/- 1 dB, Frequency Sensitivity +/- 0.75 dB, Directivity 18 dB. Tags: Module with Connectors. More details for HDC1108-30 can be seen below.