***

id: 545f7c65-abb3-4d69-98c2-b1235ee22171
title: setMediaElementSinkId
slug: /js/reference/webrtc/set-media-element-sink-id
description: setMediaElementSinkId function in the WebRTC namespace.
max-toc-depth: 3
----------------

### setMediaElementSinkId

* `Const` **setMediaElementSinkId**(`el`, `deviceId`): `Promise<undefined>`

Assigns the specified audio output device to the specified `HTMLMediaElement`. The device with id `deviceId` must be an audio output device. Asynchronously returns whether the operation succeeded.

<Note>
  Some browsers do not support output device selection. You can check by calling [supportsMediaOutput](/docs/browser-sdk/v3/js/reference/webrtc/supports-media-output).
</Note>

#### Parameters

<ParamField path="el" type="HTMLMediaElement | null" required={true}>
  Target element.
</ParamField>

<ParamField path="deviceId" type="string" required={true}>
  Id of the audio output device.
</ParamField>

#### Returns

`Promise<undefined>`

#### Example

```javascript
const el = document.querySelector("video");
const outDevices = await SignalWire.WebRTC.getSpeakerDevicesWithPermissions();
await SignalWire.WebRTC.setMediaElementSinkId(el, outDevices[0].deviceId);
// true
```