# Internal / External RF

The configuration settings for both the Internal and External RF pages work the same. The only difference is that the **Internal RF** section is for configuring the built-in module and the **External RF** section is for configuring an RF module in the external module bay.

The Internal / External RF modules are "active" for a model when the buttons are yellow and inactive when they are white.

<div><figure><img src="/files/ZRCBoI4Zn8Y0AFL7bWkU" alt=""><figcaption><p>Internal RF with multi-protocol module selected</p></figcaption></figure> <figure><img src="/files/k9BwUB7ITQePuaYInzi1" alt=""><figcaption><p>Internal RF with CRSF selected</p></figcaption></figure></div>

The configuration options are: ***off*** or the ***module name*** of the installed module as configured in the [*hardware*](/v2.8/edgetx-user-manual/user-manual-for-color-screen-radios/radio-settings/hardware.md) section of the ***Radio*** settings. Configuration options are unique to each installed module. Please consult the manufacturer's documentation for configuration options.&#x20;

{% hint style="info" %}
Configuration options for the multi-protocol module are described here:  <https://www.multi-module.org/using-the-module/protocol-options>
{% endhint %}

#### Receiver number

The receiver number is a user-assigned number for a model that is sent to the receiver when bound. Each model must have a unique receiver number. However, models using different protocols may have the same receiver number without issues.  EdgeTX will inform you when a receiver number is unique or if it is already being used with a text above the number field.

{% hint style="info" %}
If using the radio in gamepad mode, both internal and external RF modules should be turned off. This will result in increased performance when connected to a computer via USB.&#x20;
{% endhint %}


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