The CSM-11-2G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 1500 to 2500 MHz, Coupling 11 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.8 dB, Directivity 23 dB. Tags: Module with Connectors. More details for CSM-11-2G SQ can be seen below.