# Bluetooth Pairing (Android)

1. **Turning on the 5K**
   * To turn on the 5 K, press and hold the bottom button with the Blue LED for over 3 seconds.
2. **Entering Pairing Mode**
   * Press the top button with the Blue LED for over 3 seconds to enter pairing mode.
   * The Red and Blue LEDs will blink alternately when the device enters pairing mode.
3. **Setting Up Bluetooth on an Android Smartphone**
   * Go to **Settings** → **Connections** → **Bluetooth**.
   * Tap **Scan** (Search) in the top-right corner of the Bluetooth menu.
4. **Pairing Complete**
   * Once pairing is successfully completed, "Qudelix-5K" will appear in the paired device list, as shown below.
   * Connected for calls([HFP](https://www.bluetooth.com/specifications/specs/hands-free-profile-1-8/)) → Supports phone calls.
   * Connected for audio([A2DP](https://www.bluetooth.com/specifications/specs/advanced-audio-distribution-profile-1-4/)) → Supports music streaming.

<figure><img src="/files/8UBJbYjFK52uYFLsFjes" alt="" width="375"><figcaption></figcaption></figure>

5. **SONY LDAC Settings**
   * In the menu, tap the device settings button next to "Qudelix-5K" to access the detailed settings menu.
   * Enable LDAC (or High-Quality Audio). (Recommended)

<figure><img src="/files/jYYZ6xS0OuoiAOql9SG7" alt="" width="375"><figcaption></figcaption></figure>

{% hint style="info" %}
Advanced LDAC settings can be configured in Android Developer Mode.

Refer to the [detailed LDAC settings](/general/android-ldac-setting.md).
{% endhint %}

***

<figure><img src="/files/B3rbCfM3NIG4V5qVM2Na" alt="" width="331"><figcaption><p>SONY LDAC Logo</p></figcaption></figure>

{% hint style="info" %}
\*LDAC and LDAC logo are trademarks of Sony Corporation.

[**https://www.sony.net/Products/LDAC/**](https://www.sony.net/Products/LDAC/)

\*Qudelix is an official SONY LDAC Technical Partner and works closely with SONY headquarters.
{% endhint %}


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