... , SMS Printer mainly consists of shell, antenna, battery, AC adaptor, PCB and components, GSM module, thermal printer and firmware, ... by GPRS or SMS mode.2) Power supply: power adapter or battery. When the power is off, the user can print ... menu operation interface, easy operationTechnical indices1) Power supply2) AC input: 100V-240V AC3) Power adaptor output: DC 9V/3A4) Operation temperature: -20—+80 ...