# NRSDK Fundamentals

- [NRSDK Overview](/nrsdk/v2.1.0/nrsdk-fundamentals/core-features.md)
- [XREAL Devices](/nrsdk/v2.1.0/nrsdk-fundamentals/xreal-devices.md)
- [XREAL Glasses](/nrsdk/v2.1.0/nrsdk-fundamentals/xreal-devices/readme.md)
- [Controller](/nrsdk/v2.1.0/nrsdk-fundamentals/xreal-devices/controller.md)
- [Compatibility](/nrsdk/v2.1.0/nrsdk-fundamentals/xreal-devices/compatibility.md)
- [Getting Started with NRSDK](/nrsdk/v2.1.0/nrsdk-fundamentals/quickstart-for-android.md)
- [Sample Code](/nrsdk/v2.1.0/nrsdk-fundamentals/sample-code.md)
- [Tutorials](/nrsdk/v2.1.0/nrsdk-fundamentals/tutorials.md)
- [Release Note](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note.md)
- [NRSDK 2.1.1](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-2.1.1.md)
- [NRSDK 2.1.0](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-2.1.0.md)
- [NRSDK 1.10.2](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.10.2.md)
- [NRSDK 1.9.5](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.9.5.md)
- [NRSDK 1.9.3](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.9.3.md)
- [NRSDK 1.9.1](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.9.1.md)
- [NRSDK 1.8.0](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.8.0.md)
- [NRSDK 1.7.0](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.7.0.md)
- [NRSDK 1.6.0](/nrsdk/v2.1.0/nrsdk-fundamentals/release-note/nrsdk-1.6.0.md)