The 317.2009-30/S from Microwave Devices Inc. is a Directional Coupler with Frequency 800 to 900 MHz, Coupling 30±0.75 dB, Coupling Variation ±0.75 dB, Frequency Sensitivity ±0.50 dB, Directivity 20 dB. Tags: Module with Connectors. More details for 317.2009-30/S can be seen below.