What does an RFID tag identify using radio waves?

An RFID tag identifies individual items or groupings of products using radio waves by transmitting information stored in its chip to a reader, which then processes and identifies the item based on that data. This capability allows retailers to manage inventory more efficiently, track products throughout the supply chain, and improve the accuracy of stock counts.

RFID technology can uniquely identify each item, making it highly versatile, as it can also be used to identify groups of products bundled together, such as cases or pallets of goods. This ability to gather information on both single items and larger product groupings makes RFID a valuable tool in the retail industry.

Other options do not accurately describe the primary function of RFID tags. They are not specifically designed to store payment information, which is a different aspect of retail technology, nor do they inherently track product expiration dates. While RFID can assist in managing inventory that may include items with expiration dates, that is a secondary and indirect use of the technology.