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You can buy eink shelf labels that have radios in them for the self updating pricing and promotional pricing features. Not sure if they make ones that can handl

• bbarnett 5y ago
  I've heard of these, but never seen them in use (Quebec). Probably due to risks, as local law says (when using barcodes, without prices on each prooduct): Rules of the Accurate Pricing Policy If the pricing error involves a product that costs $10 or less, the product is given to the customer free of charge. If the pricing error involves a product that costs more than $10, the merchant must sell the item at the advertised price and give the consumer a $10 discount. If the same pricing error occurs for identical products during the same transaction, the merchant must sell each product at the advertised price, but the $10 discount only applies to one product. Mistaken updates, or hacking, could be quite costly. Maybe this risk is just perception, but...