Many retailers are now installing digital pricing displays throughout stores in order to satiate the appetites of consumers bargain hunting on their smartphones as they walk the aisles. Big names such as Kohl's, Sears and Home Depot have already installed these electronic shelf tags, which allows frequent changing of product prices, in order to compete with online marketplaces such as Amazon. However, the investment to going digital is pricey. While a digital shelf display is only about $5, the cost of outfitting a single store can top six figures for a big-box retailer with tens of thousands of products. Story