The CDM-10-1.9G SQ from Crane Aerospace & Electronics is a Dual Directional Coupler with Coupling 10 dB, Coupling Variation ±1 dB, Frequency 1500 to 2300 MHz, Average Power 5 W, Insertion Loss 1.5 dB. Tags: Module with Connectors. More details for CDM-10-1.9G SQ can be seen below.