> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/products/cn/headless-browser/she-bei-lei-xing.md).
# 设备类型
不必在本地库配置中手动设置视口、触摸支持和 User-Agent 标头（这会导致指纹不匹配并触发连接超时），无头浏览器 允许你通过添加以下内容原生模拟特定设备类别： `p_device` 查询参数到你的连接字符串：
```bash
wss://username:password@ubc.oxylabs.io?p_device=mobile
```
### 支持的设备配置文件
你可以配置 `p_device` 参数，使用以下三种支持的设备配置文件：
参数值
说明
桌面 （默认）
全尺寸视口、桌面平台标头、标准鼠标/键盘输入方案，以及桌面端 User-Agent 字符串。
移动
紧凑的移动端视口，启用触摸事件 API，移动操作系统平台标头，以及移动端 User-Agent。
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://developers.oxylabs.io/products/cn/headless-browser/she-bei-lei-xing.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.