Applicable XR devices This guidance helps you build experiences for these types of XR devices. [Learn about XR device types →](https://developer.android.com/develop/xr/devices)  Audio \& Display Glasses [](https://developer.android.com/develop/xr/devices#audio-display) [Learn about XR device types →](https://developer.android.com/develop/xr/devices)
As your user interacts with your app's experiences on audio glasses and display glasses, you'll need to communicate information back to them to provide a high-quality, interactive user experience. This guide explains the following areas: - [Handling audio output using Text to Speech](https://developer.android.com/develop/xr/jetpack-xr-sdk/tts). - [Integrating with the Gemini Live API](https://developer.android.com/develop/xr/jetpack-xr-sdk/gemini-live). This guide assumes you're familiar with the following concepts: - [Android activities](https://developer.android.com/guide/components/activities/intro-activities) - [The activity lifecycle](https://developer.android.com/guide/components/activities/activity-lifecycle) - [Activity state changes](https://developer.android.com/guide/components/activities/state-changes)