Phoenix OS is an Android-based operating system designed for use on personal computers. Here are a few key details:

1. **Android Adaptation:** Phoenix OS adapts the Android operating system to run on desktops and laptops, providing a familiar Android user interface with desktop-like features.

2. **Multi-Window Support:** It offers multi-window support, allowing users to run multiple Android apps simultaneously in separate windows, similar to a traditional desktop environment.

3. **Gaming Emphasis:** Phoenix OS is optimized for gaming, providing users with an Android gaming experience on larger screens. It includes key mapping features to enhance gameplay using keyboard and mouse.

4. **File Compatibility:** Users can access and manage files in a way similar to a desktop OS, making it easier to handle documents, media, and other files on a PC.

5. **Free and Open Source:** Phoenix OS is freely available for download, and it is an open-source project. Users can customize and modify the system according to their preferences.

6. **Resource Efficiency:** It is designed to run on a variety of hardware configurations, making it accessible for users with older or less powerful computers.

Keep in mind that information might have changed after my last update in January 2022, so it’s a good idea to check the official Phoenix OS website for the latest details.