> ## Documentation Index
> Fetch the complete documentation index at: https://docs.brikl.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Button 21

> Horizontal volume control with minus button, numeric input display, speaker icon, and plus button.

<Frame>
  ![Button 21](https://ffciaqoksnnzuihswbxs.supabase.co/storage/v1/object/public/components/Elements/Buttons/button-with-invisible-input-volume.png)
</Frame>

## Overview

Button 21 is a quantity/volume stepper component featuring two circular icon buttons (minus and plus) flanking a read-only numeric input field with a speaker icon. It is designed for adjusting numeric values such as volume or quantity, with hover and disabled states for interactive feedback.

## How to use

<Steps>
  <Step titleSize="h4" title="Open the Brikl panel">
    Navigate to the **Elements** category in the Brikl panel.
  </Step>

  <Step titleSize="h4" title="Copy the component">
    Find **Button 21** and click **Copy**.
  </Step>

  <Step titleSize="h4" title="Paste into your editor">
    Paste it into your Bubble canvas with `Cmd + V` (Mac) or `Ctrl + V` (Windows),
    or right-click on the canvas and select **Paste**.
  </Step>
</Steps>

## States

This component includes conditional states that automatically change its appearance.

| State    | Trigger                                             | Visual effect                                                                 |
| -------- | --------------------------------------------------- | ----------------------------------------------------------------------------- |
| Hovered  | User hovers over the minus or plus button           | Button background color changes to rgba(245, 244, 244, 1) — a light grey tint |
| Disabled | Button is not clickable (isnt\_clickable condition) | Button opacity reduces to 50%, visually indicating it is inactive             |

<Note>
  These states are handled natively by Bubble and require no additional setup.
  They will work automatically once the component is pasted into your editor.
</Note>

## Responsive

This component adapts to mobile screens. Font sizes and layout automatically adjust on screens smaller than Bubble's built-in mobile breakpoint.

## Requirements

|             |                       |
| ----------- | --------------------- |
| License     | Starter plan required |
| Plugins     | None                  |
| Custom code | Not required          |

## Platforms

| Platform | Supported |
| -------- | --------- |
| Web      | ✅         |
| Mobile   | ✅         |

## License

<Note>
  This component requires a **Starter** plan.
</Note>