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With a combination of video surveillance and radio frequency identification (RFID), retailers can not only improve inventory protection but also gather insights into customer preference and buying habits. RFID utilizes radio waves to send signals to tags or labels attached to objects to be identified. The tag includes a unique serial number and is embedded with a transmitter and receiver. Any object containing a tag can be tracked through two-way radio transmitter-receivers called interrogators or readers that sends a signal to the tag and reads its response. The tag can operate several feet away and does not require to be within direct sight of the reader unlike a barcode.