Waterproof Bluetooth Smart Watch is embedded With Dual NFC Chips,with low and high frequency bands.The Frequency band are 12-14MHZ and 125KHZ respectively ,which are both conformed to ISO 14443A protocol standards.The NFC Chips have rewritable properties,the sensor area is placed in the bracelet surface,with 1-5 cm read/write range (dual to different reader/writer,the read range is varied).
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