... method2.Support 3.3V low voltage system3.Support 3.5V-9V power(best performance when 7.2-8.5V)4. High speed ... and low power consumption option5. Serial (RS-232C,TTL) Interface/ Parallel interfaceItemSpecificationPrinting ... , 50mmø)InterfaceSerial(RS-232C ,TTL)/Parallel interfaceInput PowerDC 3.5V-9V, 15W/ DC 5V,3AOperating temperature5°C ~ 50°CStorage temperature- ...