The CDM-30-.5G SQ from Crane Aerospace & Electronics is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency 390 to 610 MHz, Average Power 5 W (CW), Insertion Loss 0.25 dB. Tags: Module with Connectors. More details for CDM-30-.5G SQ can be seen below.