The QHK-2-4.5G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 3 to 6 GHz, Frequency Sensitivity ±0.5 dB, Coupling 3 dB, Power 10 W, Amplitude Balance ±0.7 dB. Tags: Module with Connectors. More details for QHK-2-4.5G SQ can be seen below.