Approximately what maximum distance must two NFC-enabled mobile devices typically be within for successful communication to occur?
Up to 50 centimeters (about 20 inches)
Up to 5 meters (about 16 feet)
Around 4 centimeters (about 1.5 inches) or less
Up to 10 meters (about 33 feet)
Near-field communication (NFC) is intentionally limited to very short distances to reduce accidental connections and eavesdropping. The ISO/IEC 18092 and related NFC Forum specifications define an operational volume of about 4 cm (1.5 in) or less between devices. Distances of tens of centimeters or meters are far beyond the NFC near-field coupling range and would require different wireless technologies such as Bluetooth or Wi-Fi.
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