... antenna, battery, AC adaptor, PCB and components, GSM module, thermal printer and firmware, among them, only PCB and firmware is designed ... parts inside such as GSM module, shell, antenna, thermal printer is designed and manufactured by other companies. Furthermore, if it ... web)7) Standalone device, no need to connect to PC8) 128*64 LCD Display, 24 keys, menu operation interface, easy operationTechnical ...