What is the operating frequency for electronic shelf labels (esl)?

As you known. we are professional electronic labels manufacturers. we have different solutions for different fields, such as supermarket, warehousing, meeting room, digital intelligent medical care and so on.

So we have  Bluetooth  2.4GHz  operating frequency ,Rf 433Hz operating frequency  ,NFC 13.56Mhz operating frequency  and Wifi 802.11.b/g/n operating frequency.

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