Which advanced technology is NOT typically integrated into modern smart shelves in grocery stores?

The food retail industry is constantly evolving with new technologies to enhance customer experience and operational efficiency. Smart shelves represent one of the most significant retail innovations in recent years, changing how grocery stores manage inventory and interact with customers. Test your knowledge about this cutting-edge food retail technology that's transforming how we shop for groceries!

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Weight sensors that detect when products are removed and automatically update inventory
Digital price displays that can be updated remotely in real-time
Automated food freshness detection that changes product pricing based on shelf life
RFID technology that tracks product movement and helps prevent theft