# \&roomtier1bitrate

Room Option! ([`&room`](/advanced-settings/setup-parameters/room.md))

## Aliases

* `&rt1b`
* `&roomonlylowbitrate`
* `&rolb`

## Options

Example: `&roomtier1bitrate=1500`

| Value                  | Description                                                        |
| ---------------------- | ------------------------------------------------------------------ |
| positive integer value | total room-only bitrate budget, in kbps, for weaker mobile devices |

## Details

`&roomtier1bitrate` changes the lower automatic room-only bitrate tier.

The default is `1500`-kbps.

This value is used for mobile devices that appear weaker, older, or under CPU pressure. It is a total room budget, not a per-stream bitrate. If the guest is watching three visible videos and the tier is `1500`, each video is requested at about `500`-kbps.

This automatic tier is mainly for guest-only room calls. If the guest is connected to a director or scene viewer, production-safe behaviour takes priority unless you explicitly use room bitrate parameters.

{% hint style="info" %}
Use this on the guest invite links if you want all guests in a room-only call to share the same low-tier value.
{% endhint %}

## Related

{% content-ref url="/pages/Ju2QlEV69aQByO2kgIP1" %}
[\&roomtier2bitrate](/advanced-settings/video-bitrate-parameters/and-totalscenebitrate/roomtier2bitrate.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MZdvtBaFUhrjd8ttCqN" %}
[\&totalroombitrate](/advanced-settings/video-bitrate-parameters/and-totalscenebitrate/totalroombitrate.md)
{% endcontent-ref %}

{% content-ref url="/pages/2sMgzgRpMONN0QYeQ2X9" %}
[Room-only mobile bitrate tiers](/guides/room-only-mobile-bitrate-tiers.md)
{% endcontent-ref %}


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