Unlike dedicated office and home printers printers for many industries, the area of application-specific design and development needs of the printers that have specific functions, mainly for a variety of receipts, tickets, barcode and label printing, etc.. As an electronic information technology and automatic identification technology, important information output device, special printers have been widely used in commercial / retail, industrial / manufacturing, transportation / transportation, modern logistics, finance, taxation, restaurants, lottery tickets, medical care, communications, government agencies and other fields.