# 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 %}


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