# Classic Alarms Devices Bandwidth Usage

{% hint style="success" %}
This article is a guide for classic Alarms. Refer to this [article](/new-alarms/reports-and-monitoring/alarms-devices-bandwidth-usage.md) if you have new 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 %}

***

## BC51 (Alarms console)

While watching live-view:

* 5-minute input rate 0.9 Mbps
* 5-minute output rate 0.3 Mbps

{% hint style="danger" %}
**As of August 2023,** Verkada has replaced the BC51 Alarm Console with the [BC82 Alarm Console](https://www.verkada.com/alarms/console/). For details, see the [End-of-Sale announcement](/command/need-help/end-of-sale-products-policy-overview/end-of-sale-announcement-for-bc51.md).
{% endhint %}

## BC82(Alarms console)

While watching live-view:

* 5-minute input rate 0.1 Mbps
* 5-minute output rate 1.2 Mbps

{% hint style="warning" %}
The BC51 and the BC82 use WebRTC for real-time video/audio streaming. This means that the input and output rates can be higher or lower depending on available bandwidth and if you are actively watching the live stream.
{% endhint %}

## BK21/BK11 (Alarms console)

* 5-minute input rate 0.1 Mbps
* 5-minute output rate .1 Mbps

{% hint style="warning" %}
The BK21 and BK11 use WebRTC for real-time audio streaming. This means the input and output rates can be higher or lower depending on available bandwidth and if you are actively calling the console.
{% endhint %}

## BH61 (wireless hub) and BP41 (Alarms panel)

* 5-minute input rate 20 kbps
* 5-minute output rate 20 kbps

{% hint style="warning" %}
These numbers may be higher or lower depending on how many sensors are connected to a given hub and how many events these sensors generate.
{% endhint %}


---

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