Which technology is NOT typically integrated into modern retail smart shelf systems?

Retail technology is transforming the way stores operate and collect data. One of the most significant innovations in recent years is the implementation of smart shelf technology. These intelligent systems are changing inventory management, customer experience, and data analytics in physical retail environments. Test your knowledge about this cutting-edge retail technology advancement that's reshaping the industry landscape.

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RFID sensors for automatic inventory tracking
Electronic shelf labels (ESLs) for dynamic pricing
Blockchain verification for customer purchases
Weight sensors to detect product removal