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Merchants are adjusting their operations to the changing customer habits. Smart payment devices can perform transactions more effectively using smart payment devices than they can with traditional, stationary point of sale (POS) terminals. Merchants can use them everywhere, from outdoor pop-up shop to a festival to a brick-and-mortar store, thanks to the 4G and Wi-Fi connection they provide. Merchants may also benefit from extra services provided by smart devices, such as inventory management with features that allow constructing product libraries and leveraging barcode scanning data.