> For the complete documentation index, see [llms.txt](https://help.aranet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.aranet.com/aranet4/aranet4-home/usage-and-measurements/default-settings.md).

# Default Settings

The Aranet4 is calibrated in the factory, and it works instantly when you take it out of the box and insert the batteries – no additional setup is needed. These are the default settings of the Aranet4 device:

* The default measurement interval is set to 5 minutes.
* CO₂ sensor automatic calibration is disabled.
* The default temperature measurement units are set to Celsius.
* Bluetooth connection is enabled.
* Bluetooth connection transmission range is set to normal.
* The buzzer for audio sound alarm notifications is disabled.
* CO₂ indication is set to human mode.
* Access to the Smart Home assistant is enabled.

The 2nd, 3rd, and 4th settings can be changed with the switches in the battery compartment on the back of the device for the Aranet4 screen, but the remaining five settings can only be changed via the Aranet Home phone application.

{% hint style="info" %}
To change a switch, open the battery compartment and move the switch up or down with the pin tool supplied with the device. You can do this with the batteries inside. If you change the switches with the batteries removed, the new settings start working once the batteries are back in.
{% endhint %}

{% hint style="warning" %}
Removing the batteries erases the measurement history stored on the device. Open the Aranet Home app and let it sync first, so the history is kept in the app.
{% endhint %}

More information about Aranet4 settings in the Aranet Home app: [Sensor Management](/aranet-home-app/aranet-home-app/sensor-management-tiles.md#aranet4)


---

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