# Set Up Universal Transmitter Mode on a BR31

{% hint style="success" %}
This article is a guide for new Alarms. Refer to this [article](/classic-alarms/installation/set-up-universal-transmitter-mode-on-a-br31-with-classic-alarms.md) if you have classic Alarms. See [New Alarms vs Classic Alarms](/new-alarms/getting-started/new-alarms-vs-classic-alarms.md) if you are unsure which version of Alarms you have.
{% endhint %}

***

The [Verkada BR31 wireless door sensor](https://docs.verkada.com/docs/br31-quick-start-guide.pdf) acts as a universal transmitter to allow wired alarm devices to connect wirelessly to Verkada hubs. This is beneficial when vertical sensor installation isn’t possible due to door framing.

{% stepper %}
{% step %}
**Collect the required components, including the main body of the BR31, a T10 Torx screwdriver, and the wired sensor.**

<div align="left" data-with-frame="true"><img src="/files/HwcrI1KcnSJrgp8gr6jo" alt="" width="543"></div>
{% endstep %}

{% step %}
**Use the T10 Torx screwdriver to unscrew the Torx screw on the underside of the BR31. Remove the backplate of the unit.**

<div align="left" data-with-frame="true"><img src="/files/NBESR48EyDrkQa1RpELq" alt="" width="563"></div>
{% endstep %}

{% step %}
**Plug the leads of the wired alarm sensor into the 2 inputs at the top of the BR31 unit. Polarity does not matter in this case.**

<div align="left" data-with-frame="true"><img src="/files/kZGqgukXR83O21DBZBbM" alt="" width="563"></div>
{% endstep %}
{% endstepper %}

***

## Command configuration

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[Add the device](/command/organization-settings/add-a-device-to-your-command-organization.md) to Command before you continue.
{% endhint %}

{% stepper %}
{% step %}
**In Verkada Command, go to All Products > Alarms.**
{% endstep %}

{% step %}
**Select your Alarms site.**
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{% step %}
**In the left navigation, click Devices.**
{% endstep %}

{% step %}
**Click your sensor and select Device Settings > Enable Transmitter Mode.**
{% endstep %}
{% endstepper %}

{% hint style="warning" %}
Before a sensor updates its configuration, an event needs to trigger (tamper, door open/close, etc.). Press the button on the back or move a magnet near the sensor; this will prompt it to immediately retrieve the latest configuration.
{% endhint %}


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