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    How to install the equipment?
    My product has malfunctioned, how can I get after-sales service?
    I wanted to understand if from the App it is possible to know if the sensor is offline, also because I have been out of the office for a long time.
    The device is turned on but no power is passed through?
    Why does the device go offline once it is operated in the App?
    Can I get an invoice for the device I bought?
    Why does the advertised product function not match the manual and actual function?
    The device indicator fails into flash mode?
    How to turn on/off the indicator light or backlight of the device?
    The product function not match with the instruction?

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