The CDM-20M-15G from Crane Aerospace & Electronics is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1.25 dB, Frequency 12400 to 18000 MHz, Average Power 50 W (CW), Insertion Loss 1 dB. Tags: Module with Connectors. More details for CDM-20M-15G can be seen below.