Which technology is NOT typically integrated into smart shelf systems in modern grocery stores?

The food retail landscape is being transformed by innovative technologies aimed at enhancing customer experiences and operational efficiency. Smart shelves represent one of the most significant advancements in this space, combining sensors, digital displays, and AI to create interactive shopping environments. This poll tests your knowledge about how these intelligent systems are changing the way we shop for food products and how retailers manage inventory and customer engagement in modern grocery stores.

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Weight sensors that detect when products are removed and automatically update inventory
Digital price tags that can be updated remotely and display nutritional information
Voice recognition systems that respond to customer product inquiries directly at the shelf
LED light systems that guide shoppers to requested items on their shopping lists