How do those barcode scanning bag storage lockers work? How to operate?

Machine barcode type electronic storage cabinet: storage: press the "save" button, the storage cabinet automatically prints a code bar, the machine voice prompts: "Please take the code bar". The user draws out the code paper, the corresponding box door opens automatically, and close the box door after storage. When you take out the goods: directly scan the barcode paper in the scanning port, the corresponding box door will be opened automatically. Voice prompt: "Please close the door after taking the items." Changshu JINWANGDA electronic equipment factory, the production and sales of automatic electronic barcode storage cabinet, coin storage cabinet and other types of bag storage cabinets, suitable for large supermarkets, libraries, department stores, museums, schools, stations and terminals, etc.