The CDM-30-1.9G SQ from Crane Aerospace & Electronics is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 1500 to 2300 MHz, Average Power 20 W (CW), Insertion Loss 0.25 dB. Tags: Module with Connectors. More details for CDM-30-1.9G SQ can be seen below.