The CSM-30-4.85G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 3400 to 6275 MHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.75 dB, Directivity 15 dB. Tags: Module with Connectors. More details for CSM-30-4.85G SQ can be seen below.