The CSC-20-2.25G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 2100 to 2400 MHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 20 dB, Average Power 30 W. Tags: Module with Connectors. More details for CSC-20-2.25G SQ can be seen below.