This is how a Barcode Price Checker works
You will often find a Price Checker on a shelf of a store, like a supermarket, electronics shop or DIY shop. There may also be a screen with a Barcode Scanner below it, which you can use to scan a product's barcode. You hold the product near the Barcode Scanner and the relevant information is shown on the display.
The primary function of a Price Checker is obviously to display a product's name and price when the customer scans a barcode. But it can do so much more. Sometimes, a Price Checker is used to show additional product information. Like the product's expiry date, nutritional values and ingredients. Or to show whether a product is on offer or not. However, you might also consider interactive content, essential product information which would otherwise not fit on the packaging or even complete previews of games and films.
There are also applications in the market which use a similar solution to a Price Checker: a product comparer or a choice assistant. These devices help the customer choose a certain product, based on several variables that they enter.