--- sidebar_label: Device --- # Device interface #### Signature: ```typescript export interface Device ``` ## Properties <table><thead><tr><th> Property </th><th> Modifiers </th><th> Type </th><th> Description </th><th> Default </th></tr></thead> <tbody><tr><td> <span id="useragent">userAgent</span> </td><td> </td><td> string </td><td> </td><td> </td></tr> <tr><td> <span id="viewport">viewport</span> </td><td> </td><td> [Viewport](./puppeteer.viewport.md) </td><td> </td><td> </td></tr> </tbody></table>