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Feature: Frequency range: 525-1625KHZ IF: 465KHZ Sensitivity: <1.5mv Selective: >20db Power supply: two AA batteries (kit without batteries). Note: We don't offer any manuals, only has schematic, sorry for the inconvenience. B6: input transformer (Blue) B7: output transformer, connect with loudspeaker (Red) Package included: 3 x Seven AM Radio Electronic DIY Kit