> For the complete documentation index, see [llms.txt](https://docs.eseye.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eseye.com/hera204/physical-specifications-and-mounting.md).

# Physical specifications and mounting

The following physical specifications and mounting requirements help you choose a suitable installation location for the Hera 204.

### Physical specifications

| **Specification**         | **Details**                            |
| ------------------------- | -------------------------------------- |
| Dimensions (W × D × H)    | 99 × 90 × 28 mm                        |
| Weight                    | 250 g                                  |
| Enclosure                 | Aluminium                              |
| Power supply              | 12 V DC Molex Mini-Fit Jr wall adapter |
| Input voltage range       | 9–24 V DC                              |
| Maximum power consumption | 10 W                                   |
| Operating temperature     | −20°C to 55°C                          |
| Operating humidity        | 5% to 95%, non-condensing              |

### Mounting requirements

The Hera 204 supports direct mounting and bottom or side DIN rail mounting using an optional mounting kit.

Choose a location that:

* Is away from direct sunlight and other heat sources.
* Provides sufficient ventilation around the router.
* Is not exposed to excessive dust, liquids, or industrial exhaust.
* Is within one metre of a mains power outlet.
* Keeps cellular antennas at least one metre away from people during normal operation.
* Allows access to the router’s ports, SIM slot, and reset button.

{% hint style="warning" %}
Do not mount the Hera 204 more than two metres above the floor. A falling router could cause injury.
{% endhint %}

{% hint style="warning" %}
The supplied antennas are not designed for outdoor use. If you use an outdoor antenna, ensure adequate lightning protection.
{% endhint %}

{% hint style="warning" %}
Use only an Eseye-approved Limited Power Source mains adapter. It must comply with IEC/UL 60950-1 or IEC/UL 62368-1. Do not modify the power adapter.
{% endhint %}

### SIM card orientation

Insert an external SIM card in the orientation shown:

![SIM card insertion orientation](https://733576849-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FY2LsJ6998Uo7AtYcmJWd%2Fuploads%2FDTA5YXSpgd5FaRb7GQ17%2Fsim_card_insertion_orientation.png?alt=media\&token=969b1e20-147b-432c-ba29-50b01835d3a1)

After mounting the router, see [Connect Hera 204](/hera204/get-started/connect-hera-204.md).


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