# Important information

## Introduction

Thank you for purchasing Efento NB-IoT wireless logger! This manual contains important information necessary to operate Efento Loggers and, if followed, reduce the risk of damaging your devices.

We have designed Efento NB-IoT wireless loggers considering safety requirements and user-friendliness. Despite this, the Efento NB-IoT wireless loggers can pose risks if used inappropriately or incorrectly. We refer to possible hazards in the section “Safety” and with safety notes placed in this user manual. The safety instructions in this document must be followed at all times.

## Markings

The following marks may be found on the Efento NB-IoT wireless loggers or/and on the packaging:

<table data-header-hidden><thead><tr><th width="92.99609375"></th><th></th></tr></thead><tbody><tr><td><img src="/files/2a940d650c26ddd8d129792aba7c5219e406a763" alt=""></td><td>CE mark of conformity: indicating the fulfillment of Radio Equipment Directive (RED) 2014/53/EU</td></tr><tr><td><img src="/files/2b8e1a50e536e9122ff333b12df09b44152c1dd4" alt=""></td><td>Dustbin symbol: Efento products must not be disposed of in the household trash, but only in accordance with local laws and regulations.</td></tr><tr><td><img src="/files/772f69ca122ad9ae713926362e2a32541b55bd6c" alt=""></td><td>RoHS symbol: indicating the fulfillment of 2002/95/EC directive (RoHS)</td></tr><tr><td><img src="/files/4620ed286b20c632dc723f61857e98d9c3b85b36" alt=""></td><td>FCC ID indicating the compliance with Part 15, Subpart C of the FCC Rules.<em>Efento NB-IoT sensor FCC ID: 2BALY-HC5</em></td></tr></tbody></table>

## Liability

The information contained in this operating manual describes but does not guarantee the features of the product. No liability is accepted for damage caused by:

* improper use,
* failure to follow the operating manual,
* unauthorized modifications of the Efento NB-IoT wireless loggers,
* improper work on and with the Efento NB-IoT wireless loggers,
* unauthorized repairs,
* emergencies, external influences or force majeure.

## Intended Use

Efento NB-IoT wireless loggers are used to measure physical values and wirelessly transfer the measurements to a smartphone with Efento mobile application, Efento Cloud or third party server. The Efento NB-IoT wireless loggers can only be operated under the conditions of use described in the user manual.

## Manufacturer address

Efento sp. z o.o., Ul. Przemysłowa 12, 30-701 Krakow, Poland

## Technical support

Should you have any questions, feel free to let us know at: [help.efento.io](https://help.efento.io/)

## Safety

{% hint style="danger" %}
Risk of battery explosion due to improper battery types or damaged batteries. Only use batteries of type “Battery pack 3 x AA size, ER14505M, 3.6V“! Never use damaged batteries!
{% endhint %}

{% hint style="danger" %}
Risk of device malfunction or damage due to extreme temperatures. Do not expose the device to extreme temperatures outside of the operating limits! Store the device protected from direct sunlight, heat or fire!
{% endhint %}

{% hint style="warning" %}
Alterations or modifications not explicitly approved by the manufacturer will result in you no longer being allowed to use the device.
{% endhint %}

{% hint style="info" %}
Read the user manual before using Efento NB-IoT wireless loggers In case you have any questions, please contact our technical support at [help.efento.io](http://help.efento.io/)
{% endhint %}


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