em card module, 3v or 5v , samll size,good read range, low cost, NAMECR003 series Proximity Reader ModuleWeight10gDimensions40*20*8(mm)Read Range8-12cmInterfaceTTL232, Weigand 26/34 ,Temperature-20 +85CFrequency125KHzSUPPORT EM4001 ,EM4200,TK4100 Power RequirementDC4.6 - 5.4V ,CR003L 3.3V rfid reader moduledesfire reader moduleEM4100 /EM4102rfid modulemifare pro moduleEM4469 / EM4550rfid card ...