UHF (Ultra High Frequency) Tags, Labels and Cards operate at a high frequency. These types of tags are considered "Passive" - no onboard power source. The supply chain related mandates from retailers such as Wal-Mart, Sam's Club and Metro require that UHF Passive RFID tags be used. These tags must comply with the international recognized standard set by EPCglobal (UHF Gen 2). UHF frequencies typically offer better range (20-30 ft) and can transfer data faster than LF and HF tags, but they use more power and are less likely to pass through materials.
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