> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes. # PreflightOptions > Options for the preflight connectivity test. Options for the preflight connectivity test. ## **Properties** **`audioDevice`** `MediaDeviceInfo` Test a specific audio device instead of the currently selected one. See [`MediaDeviceInfo`](https://developer.mozilla.org/en-US/docs/Web/API/MediaDeviceInfo). --- **`duration`** `number` How long to run the media test in seconds (default: 10). --- **`skipMediaTest`** `boolean` Skip the media/bandwidth test, only test signaling + TURN + devices. --- **`videoDevice`** `MediaDeviceInfo` Test a specific video device instead of the currently selected one. See [`MediaDeviceInfo`](https://developer.mozilla.org/en-US/docs/Web/API/MediaDeviceInfo). --- > Options for the preflight connectivity test.