> For the complete documentation index, see [llms.txt](https://xreal.gitbook.io/nrsdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals.md).

# NRSDK Fundamentals

- [NRSDK Overview](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/core-features.md)
- [XREAL Devices](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/xreal-devices.md)
- [XREAL Glasses](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/xreal-devices/readme.md)
- [Controller](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/xreal-devices/controller.md)
- [Compatibility](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/xreal-devices/compatibility.md)
- [Getting Started with NRSDK](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/quickstart-for-android.md)
- [Sample Code](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/sample-code.md)
- [Tutorials](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/tutorials.md)
- [Release Note](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note.md)
- [NRSDK 2.2.1](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-2.2.1.md)
- [NRSDK 2.2.0](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-2.2.0.md)
- [NRSDK 2.1.1](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-2.1.1.md)
- [NRSDK 2.1.0](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-2.1.0.md)
- [NRSDK 1.10.2](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.10.2.md)
- [NRSDK 1.9.5](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.9.5.md)
- [NRSDK 1.9.3](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.9.3.md)
- [NRSDK 1.9.1](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.9.1.md)
- [NRSDK 1.8.0](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.8.0.md)
- [NRSDK 1.7.0](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.7.0.md)
- [NRSDK 1.6.0](https://xreal.gitbook.io/nrsdk/nrsdk-fundamentals/release-note/nrsdk-1.6.0.md)