The CSM-30M-4G from Crane Aerospace & Electronics is a Directional Coupler with Frequency 2600 to 5200 MHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Directivity 20 dB, Average Power 50 W. Tags: Module with Connectors. More details for CSM-30M-4G can be seen below.