> For the complete documentation index, see [llms.txt](https://guides.clickatell.com/chat-desk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.clickatell.com/chat-desk/agent-desk/chat-capabilities/send-attachments-media-files.md).
# Send attachments (media files)
{% hint style="warning" %}
Not supported on the SMS channel.
{% endhint %}
As an agent, you can send and receive media files (e.g., statements, invoices, screenshots, and other important documents) while chatting with customers.
The following file types are supported:
| File Type | Supported Formats/File Extensions | Can be previewed in browser vs needs to be downloaded |
| ----------------------- | ------------------------------------------------- | ----------------------------------------------------- |
| Documents | .pdf, .doc or .docx, .ppt or .pptx, .xls or .xlsx | Needs to be downloaded |
| Images | JPEG, JPG, PNG | Can be viewed in browser and can be downloaded |
| Audio | AAC, AMR, MP3, OPUS, | Can be heard in browser and can be downloaded |
| Video | MP4 | Can be viewed in browser and can be downloaded |
| USDZ (AMB channel only) | USDZ | Needs to be downloaded |
## **Attach a file**
1. Select the *paper clip* icon below the text box area.
2. A pop-up appears on which you can drag and drop the files you want to attach. You can also browse your computer to select the files to attach.
{% hint style="info" %}
The file size limit is **64Mb.** Only one attachment can be sent at a time.
{% endhint %}
3. Once the file is uploaded, click *Send file*.
4. The customer can download the file on the channel they are using. When a customer sends you a file, you can download it from within the chat window:
---
# 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://guides.clickatell.com/chat-desk/agent-desk/chat-capabilities/send-attachments-media-files.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.