People take food as their heaven. Food is an essential survival material for people. With the development of productivity, traditional restaurant ordering methods have been gradually replaced by intelligent self-service cashiers.     Compared with the traditional restaurant ordering and cashier methods, the speed is slow, handwritten records are required, the efficiency of finding money is low, and it is easy to make mistakes in calculation. The intelligent self-service cashier is more convenient, can quickly place orders, improve the speed of serving dishes, and reduce the waiting time for guests. , to avoid the embarrassing situation of making the guests unhappy due to the miscalculation when charging.   The embedded printer of Xiamen APT Electronic Technology can be embedded in the self-service cashier mobile terminal to help print bills, receipts, etc., which can greatly reduce the workload and improve the business efficiency of the catering industry. Our mini size embedded printer, with USB, RS232, TTL interface optional,and easy to use.     In addition to embedded, our desktop printers, portable printers, are also the best choice for printing receipts. Desktop printers can realize small space, efficient printing, and can automatically cut paper with a knife, which greatly liberates both hands. Portable printers can be taken anywhere, no matter which table the guests are at, they can quickly and conveniently print the content required by the guests. Portable can realize the use of USB and Bluetooth, realize the free switching of wired and wireless, and meet the application of various situations.