The CSM-6M-3G from Crane Aerospace & Electronics is a Directional Coupler with Frequency 2000 to 4000 MHz, Coupling 6 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.60 dB, Directivity 22 dB. Tags: Module with Connectors. More details for CSM-6M-3G can be seen below.