A customer asks what an item costs. A new colleague stands in front of a shelf and cannot tell which of three similar boxes belongs there. In the warehouse somebody holds a part with a barcode and no readable name. The answer is in your product list, but the list is on a computer in the office.
So people walk to the terminal, call a colleague, or guess. A printed price list is out of date soon after printing, and nobody likes to search a long printout for one article number.
If your items carry barcodes and your list can be saved as a CSV file, the phone can answer the question. DataScan keeps a copy of the list on the device and shows the matching row when a barcode is scanned. The list comes from a file or from a web address, and a list at a web address can be downloaded again every day.