... Printing Speed:Max 60mm/smotor voltage at 8.5VDC10,Printing Life:≥50Km11,Thermal head temperature detection: Via thermistor12,Paper detection: Via ... photo interrupter 13,Head working voltage:4.2~8.5VDC14,Logic ... :2.7~5.25VDC15,Motor voltage:4.2~8.5VDC16,Operating temperature:+5~450C17,Operating humidity:10%~90%RH18,Operating ...