The CSDZ-10Z-3.5G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 3300 to 3700 MHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.25 dB, Directivity 15 dB. Tags: Surface Mount. More details for CSDZ-10Z-3.5G SQ can be seen below.