---
title: "ChannelId"
---
<!-- DO NOT EDIT! This file was auto-generated by crates/build/re_types_builder/src/codegen/docs/website.rs -->

A 16-bit ID representing an MCAP channel.

Used to identify specific channels within an MCAP file.

## Rerun datatype
[`UInt16`](../datatypes/uint16.md)


## Arrow datatype
```
UInt16
```

## API reference links
 * 🌊 [C++ API docs for `ChannelId`](https://ref.rerun.io/docs/cpp/stable/structrerun_1_1components_1_1ChannelId.html)
 * 🐍 [Python API docs for `ChannelId`](https://ref.rerun.io/docs/python/stable/common/components#rerun.components.ChannelId)
 * 🦀 [Rust API docs for `ChannelId`](https://docs.rs/rerun/latest/rerun/components/struct.ChannelId.html)


## Used by

* [`McapChannel`](../archetypes/mcap_channel.md)
