The CDM-20M-3G from Crane Aerospace & Electronics is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1.25 dB, Frequency 2000 to 4000 MHz, Peak Power 3 kW, Average Power 50 W (FWD). Tags: Module with Connectors. More details for CDM-20M-3G can be seen below.