Low cost NB-IoT Dual - mode wireless meter reading system

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{"cid":"240697","pid":"33540678","pimg_url":"\/\/img1.b2bforus.com\/3e\/81\/609fc3f42ebd\/product\/128944140_s-w400xh400.jpg","name":"Bluetooth Meter Low Power Low Power Consumption NB-IoT Module Dual Mode Reading NB Bi-Directional Communication and Bluetooth Communication","attrs":{"Price":"Negotiable","MOQ":"5.0 pieces","Delivery Time":"Negotiable","Brand":"HAC"}}

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