> For the complete documentation index, see [llms.txt](https://qudelix.gitbook.io/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://qudelix.gitbook.io/home/5k/dac-amp/profile.md).

# PROFILE

Qudelix's proprietary software supports the following DAC/AMP operating modes to balance battery time and sound quality:

* **STANDARD** (ECO mode)

  * Highest efficiency / Longest battery life
  * Recommended for outdoor or on-the-go use

* **PERFORMANCE** 
  * Recommended for typical indoor Bluetooth use

{% hint style="info" %}
The current profile is automatically overridden to PERFORMANCE mode when the USB is connected.
{% endhint %}