The whole machine is made of aluminum alloy in one piece, with self-developed motherboard, low power consumption, which can ensure stable work for a long time in harsh environment. It can be upgraded with IC card identification, QR code, scan gun, alarm light, HDMI input module, etc.to meet the functions of SOP, task browsing, equipment management, defect registration, abnormal alarm, etc. It is widely used in smart factories, smart canteens, smart campuses, smart meeting reservations, etc.